Finding the Fourth Proportional to 88,875, 122,647.50 and 49,131

Step by Step Solution

1. Step 1: Write the proportion equation
   88,875 : 122,647.50 = 49,131 : x
2. Step 2: Convert to fraction form
   88,875/122,647.50 = 49,131/x
3. Step 3: Cross multiply
   88,875x = 122,647.50 × 49,131
4. Step 4: Simplify right side
   88,875x = 6,025,794,322.50
5. Step 5: Solve for x
   x = 6,025,794,322.50/88,875
6. Step 6: Final answer
   x = 67,800.78