Finding the Fourth Proportional to 20,586,564.18, 30,879,918.42 and 5,233,855.50

Step by Step Solution

1. Step 1: Write the proportion equation
   20,586,564.18 : 30,879,918.42 = 5,233,855.50 : x
2. Step 2: Convert to fraction form
   20,586,564.18/30,879,918.42 = 5,233,855.50/x
3. Step 3: Cross multiply
   20,586,564.18x = 30,879,918.42 × 5,233,855.50
4. Step 4: Simplify right side
   20,586,564.18x = 161,621,030,862,068.31
5. Step 5: Solve for x
   x = 161,621,030,862,068.31/20,586,564.18
6. Step 6: Final answer
   x = 7,850,801.59