Finding the Fourth Proportional to 20,745,287.48, 31,101,815.18 and 13,443,322.20

Step by Step Solution

1. Step 1: Write the proportion equation
   20,745,287.48 : 31,101,815.18 = 13,443,322.20 : x
2. Step 2: Convert to fraction form
   20,745,287.48/31,101,815.18 = 13,443,322.20/x
3. Step 3: Cross multiply
   20,745,287.48x = 31,101,815.18 × 13,443,322.20
4. Step 4: Simplify right side
   20,745,287.48x = 418,111,722,469,591
5. Step 5: Solve for x
   x = 418,111,722,469,591/20,745,287.48
6. Step 6: Final answer
   x = 20,154,539.81