Finding the Fourth Proportional to 102,870.91, 154,179.15 and 60,708.25

Step by Step Solution

1. Step 1: Write the proportion equation
   102,870.91 : 154,179.15 = 60,708.25 : x
2. Step 2: Convert to fraction form
   102,870.91/154,179.15 = 60,708.25/x
3. Step 3: Cross multiply
   102,870.91x = 154,179.15 × 60,708.25
4. Step 4: Simplify right side
   102,870.91x = 9,359,946,382.99
5. Step 5: Solve for x
   x = 9,359,946,382.99/102,870.91
6. Step 6: Final answer
   x = 90,987.30