Finding the Fourth Proportional to 43,142.72, 64,714.46 and 13,559.92

Step by Step Solution

1. Step 1: Write the proportion equation
   43,142.72 : 64,714.46 = 13,559.92 : x
2. Step 2: Convert to fraction form
   43,142.72/64,714.46 = 13,559.92/x
3. Step 3: Cross multiply
   43,142.72x = 64,714.46 × 13,559.92
4. Step 4: Simplify right side
   43,142.72x = 877,522,900.44
5. Step 5: Solve for x
   x = 877,522,900.44/43,142.72
6. Step 6: Final answer
   x = 20,340.00