Finding the Fourth Proportional to 91,586.72, 137,340.48 and 31,621.52

Step by Step Solution

1. Step 1: Write the proportion equation
   91,586.72 : 137,340.48 = 31,621.52 : x
2. Step 2: Convert to fraction form
   91,586.72/137,340.48 = 31,621.52/x
3. Step 3: Cross multiply
   91,586.72x = 137,340.48 × 31,621.52
4. Step 4: Simplify right side
   91,586.72x = 4,342,914,735.13
5. Step 5: Solve for x
   x = 4,342,914,735.13/91,586.72
6. Step 6: Final answer
   x = 47,418.61