Finding the Fourth Proportional to 9,206,985,665.30, 12,705,616,320.42 and 5,137,844,706.36

Step by Step Solution

1. Step 1: Write the proportion equation
   9,206,985,665.30 : 12,705,616,320.42 = 5,137,844,706.36 : x
2. Step 2: Convert to fraction form
   9,206,985,665.30/12,705,616,320.42 = 5,137,844,706.36/x
3. Step 3: Cross multiply
   9,206,985,665.30x = 12,705,616,320.42 × 5,137,844,706.36
4. Step 4: Simplify right side
   9,206,985,665.30x = 65,279,483,552,921,395,200
5. Step 5: Solve for x
   x = 65,279,483,552,921,395,200/9,206,985,665.30
6. Step 6: Final answer
   x = 7,090,212,358.97