Finding the Fourth Proportional to 80,978.09, 111,700.77 and 52,252.79

Step by Step Solution

1. Step 1: Write the proportion equation
   80,978.09 : 111,700.77 = 52,252.79 : x
2. Step 2: Convert to fraction form
   80,978.09/111,700.77 = 52,252.79/x
3. Step 3: Cross multiply
   80,978.09x = 111,700.77 × 52,252.79
4. Step 4: Simplify right side
   80,978.09x = 5,836,676,877.65
5. Step 5: Solve for x
   x = 5,836,676,877.65/80,978.09
6. Step 6: Final answer
   x = 72,077.24