Finding the Fourth Proportional to 85,810.59, 128,084.69 and 79,793.91

Step by Step Solution

1. Step 1: Write the proportion equation
   85,810.59 : 128,084.69 = 79,793.91 : x
2. Step 2: Convert to fraction form
   85,810.59/128,084.69 = 79,793.91/x
3. Step 3: Cross multiply
   85,810.59x = 128,084.69 × 79,793.91
4. Step 4: Simplify right side
   85,810.59x = 10,220,378,425.72
5. Step 5: Solve for x
   x = 10,220,378,425.72/85,810.59
6. Step 6: Final answer
   x = 119,103.93