Finding the Fourth Proportional to 91,588.55, 137,402.42 and 28,407.29

Step by Step Solution

1. Step 1: Write the proportion equation
   91,588.55 : 137,402.42 = 28,407.29 : x
2. Step 2: Convert to fraction form
   91,588.55/137,402.42 = 28,407.29/x
3. Step 3: Cross multiply
   91,588.55x = 137,402.42 × 28,407.29
4. Step 4: Simplify right side
   91,588.55x = 3,903,229,562.59
5. Step 5: Solve for x
   x = 3,903,229,562.59/91,588.55
6. Step 6: Final answer
   x = 42,617.01