Finding the Fourth Proportional to 91,513.85, 137,216.52 and 28,315.26

Step by Step Solution

1. Step 1: Write the proportion equation
   91,513.85 : 137,216.52 = 28,315.26 : x
2. Step 2: Convert to fraction form
   91,513.85/137,216.52 = 28,315.26/x
3. Step 3: Cross multiply
   91,513.85x = 137,216.52 × 28,315.26
4. Step 4: Simplify right side
   91,513.85x = 3,885,321,440.10
5. Step 5: Solve for x
   x = 3,885,321,440.10/91,513.85
6. Step 6: Final answer
   x = 42,456.11