Finding the Fourth Proportional to 43,123.12, 64,687.42 and 13,542.12

Step by Step Solution

1. Step 1: Write the proportion equation
   43,123.12 : 64,687.42 = 13,542.12 : x
2. Step 2: Convert to fraction form
   43,123.12/64,687.42 = 13,542.12/x
3. Step 3: Cross multiply
   43,123.12x = 64,687.42 × 13,542.12
4. Step 4: Simplify right side
   43,123.12x = 876,004,770.28
5. Step 5: Solve for x
   x = 876,004,770.28/43,123.12
6. Step 6: Final answer
   x = 20,314.04