Finding the Fourth Proportional to 91,592.85, 137,408.88 and 28,411.60

Step by Step Solution

1. Step 1: Write the proportion equation
   91,592.85 : 137,408.88 = 28,411.60 : x
2. Step 2: Convert to fraction form
   91,592.85/137,408.88 = 28,411.60/x
3. Step 3: Cross multiply
   91,592.85x = 137,408.88 × 28,411.60
4. Step 4: Simplify right side
   91,592.85x = 3,904,006,413.31
5. Step 5: Solve for x
   x = 3,904,006,413.31/91,592.85
6. Step 6: Final answer
   x = 42,623.48