Finding the Fourth Proportional to 91,577.15, 137,385.46 and 28,396.00

Step by Step Solution

1. Step 1: Write the proportion equation
   91,577.15 : 137,385.46 = 28,396.00 : x
2. Step 2: Convert to fraction form
   91,577.15/137,385.46 = 28,396.00/x
3. Step 3: Cross multiply
   91,577.15x = 137,385.46 × 28,396.00
4. Step 4: Simplify right side
   91,577.15x = 3,901,197,854.32
5. Step 5: Solve for x
   x = 3,901,197,854.32/91,577.15
6. Step 6: Final answer
   x = 42,600.12