Finding the Fourth Proportional to 91,742.31, 137,621.15 and 39,152.25

Step by Step Solution

1. Step 1: Write the proportion equation
   91,742.31 : 137,621.15 = 39,152.25 : x
2. Step 2: Convert to fraction form
   91,742.31/137,621.15 = 39,152.25/x
3. Step 3: Cross multiply
   91,742.31x = 137,621.15 × 39,152.25
4. Step 4: Simplify right side
   91,742.31x = 5,388,177,474.33
5. Step 5: Solve for x
   x = 5,388,177,474.33/91,742.31
6. Step 6: Final answer
   x = 58,731.65