Finding the Third Proportional to 1,388,791,858.50 and 2,115,746,406

Step by Step Solution

1. Step 1: Write the proportion equation
   1,388,791,858.50 : 2,115,746,406 = 2,115,746,406 : x
2. Step 2: Convert to fraction form
   1,388,791,858.50/2,115,746,406 = 2,115,746,406/x
3. Step 3: Cross multiply
   1,388,791,858.50x = 2,115,746,406 × 2,115,746,406
4. Step 4: Simplify right side
   1,388,791,858.50x = 4,476,382,854,501,916,672
5. Step 5: Solve for x
   x = 4,476,382,854,501,916,672/1,388,791,858.50
6. Step 6: Final answer
   x = 3,223,220,835.51