Finding the Fourth Proportional to 20,221,404.10, 30,332,106.15 and 13,418,959.30

Step by Step Solution

1. Step 1: Write the proportion equation
   20,221,404.10 : 30,332,106.15 = 13,418,959.30 : x
2. Step 2: Convert to fraction form
   20,221,404.10/30,332,106.15 = 13,418,959.30/x
3. Step 3: Cross multiply
   20,221,404.10x = 30,332,106.15 × 13,418,959.30
4. Step 4: Simplify right side
   20,221,404.10x = 407,025,297,910,129.69
5. Step 5: Solve for x
   x = 407,025,297,910,129.69/20,221,404.10
6. Step 6: Final answer
   x = 20,128,438.95