Finding the Fourth Proportional to 85,863.89, 128,170.41 and 79,532.24

Step by Step Solution

1. Step 1: Write the proportion equation
   85,863.89 : 128,170.41 = 79,532.24 : x
2. Step 2: Convert to fraction form
   85,863.89/128,170.41 = 79,532.24/x
3. Step 3: Cross multiply
   85,863.89x = 128,170.41 × 79,532.24
4. Step 4: Simplify right side
   85,863.89x = 10,193,679,809.02
5. Step 5: Solve for x
   x = 10,193,679,809.02/85,863.89
6. Step 6: Final answer
   x = 118,719.05