Finding the Fourth Proportional to 91,569.25, 137,107.78 and 58,108.15

Step by Step Solution

1. Step 1: Write the proportion equation
   91,569.25 : 137,107.78 = 58,108.15 : x
2. Step 2: Convert to fraction form
   91,569.25/137,107.78 = 58,108.15/x
3. Step 3: Cross multiply
   91,569.25x = 137,107.78 × 58,108.15
4. Step 4: Simplify right side
   91,569.25x = 7,967,078,760.87
5. Step 5: Solve for x
   x = 7,967,078,760.87/91,569.25
6. Step 6: Final answer
   x = 87,006.05