Finding the Fourth Proportional to 43,276,687.20, 64,900,086.12 and 12,562,940.16

Step by Step Solution

1. Step 1: Write the proportion equation
   43,276,687.20 : 64,900,086.12 = 12,562,940.16 : x
2. Step 2: Convert to fraction form
   43,276,687.20/64,900,086.12 = 12,562,940.16/x
3. Step 3: Cross multiply
   43,276,687.20x = 64,900,086.12 × 12,562,940.16
4. Step 4: Simplify right side
   43,276,687.20x = 815,335,898,304,406.50
5. Step 5: Solve for x
   x = 815,335,898,304,406.50/43,276,687.20
6. Step 6: Final answer
   x = 18,840,071.90