Finding the Fourth Proportional to 91,880.57, 137,636.31 and 41,891.90

Step by Step Solution

1. Step 1: Write the proportion equation
   91,880.57 : 137,636.31 = 41,891.90 : x
2. Step 2: Convert to fraction form
   91,880.57/137,636.31 = 41,891.90/x
3. Step 3: Cross multiply
   91,880.57x = 137,636.31 × 41,891.90
4. Step 4: Simplify right side
   91,880.57x = 5,765,846,534.89
5. Step 5: Solve for x
   x = 5,765,846,534.89/91,880.57
6. Step 6: Final answer
   x = 62,753.71