Finding the Fourth Proportional to 92,603.20, 139,089.33 and 87,380.83

Step by Step Solution

1. Step 1: Write the proportion equation
   92,603.20 : 139,089.33 = 87,380.83 : x
2. Step 2: Convert to fraction form
   92,603.20/139,089.33 = 87,380.83/x
3. Step 3: Cross multiply
   92,603.20x = 139,089.33 × 87,380.83
4. Step 4: Simplify right side
   92,603.20x = 12,153,740,245.27
5. Step 5: Solve for x
   x = 12,153,740,245.27/92,603.20
6. Step 6: Final answer
   x = 131,245.36