Finding the Fourth Proportional to 91,720.05, 137,551.37 and 38,411.92

Step by Step Solution

1. Step 1: Write the proportion equation
   91,720.05 : 137,551.37 = 38,411.92 : x
2. Step 2: Convert to fraction form
   91,720.05/137,551.37 = 38,411.92/x
3. Step 3: Cross multiply
   91,720.05x = 137,551.37 × 38,411.92
4. Step 4: Simplify right side
   91,720.05x = 5,283,612,200.21
5. Step 5: Solve for x
   x = 5,283,612,200.21/91,720.05
6. Step 6: Final answer
   x = 57,605.86