Finding the Fourth Proportional to 50,080.72, 69,111.42 and 31,217.92

Step by Step Solution

1. Step 1: Write the proportion equation
   50,080.72 : 69,111.42 = 31,217.92 : x
2. Step 2: Convert to fraction form
   50,080.72/69,111.42 = 31,217.92/x
3. Step 3: Cross multiply
   50,080.72x = 69,111.42 × 31,217.92
4. Step 4: Simplify right side
   50,080.72x = 2,157,514,780.65
5. Step 5: Solve for x
   x = 2,157,514,780.65/50,080.72
6. Step 6: Final answer
   x = 43,080.75