Finding the Fourth Proportional to 88,870.40, 133,046.40 and 79,539.20

Step by Step Solution

1. Step 1: Write the proportion equation
   88,870.40 : 133,046.40 = 79,539.20 : x
2. Step 2: Convert to fraction form
   88,870.40/133,046.40 = 79,539.20/x
3. Step 3: Cross multiply
   88,870.40x = 133,046.40 × 79,539.20
4. Step 4: Simplify right side
   88,870.40x = 10,582,404,218.88
5. Step 5: Solve for x
   x = 10,582,404,218.88/88,870.40
6. Step 6: Final answer
   x = 119,076.82