Finding the Fourth Proportional to 80,783.68, 111,499.86 and 52,440.16

Step by Step Solution

1. Step 1: Write the proportion equation
   80,783.68 : 111,499.86 = 52,440.16 : x
2. Step 2: Convert to fraction form
   80,783.68/111,499.86 = 52,440.16/x
3. Step 3: Cross multiply
   80,783.68x = 111,499.86 × 52,440.16
4. Step 4: Simplify right side
   80,783.68x = 5,847,070,498.38
5. Step 5: Solve for x
   x = 5,847,070,498.38/80,783.68
6. Step 6: Final answer
   x = 72,379.35