Finding the Fourth Proportional to 40,810.16, 56,326.80 and 31,144.72

Step by Step Solution

1. Step 1: Write the proportion equation
   40,810.16 : 56,326.80 = 31,144.72 : x
2. Step 2: Convert to fraction form
   40,810.16/56,326.80 = 31,144.72/x
3. Step 3: Cross multiply
   40,810.16x = 56,326.80 × 31,144.72
4. Step 4: Simplify right side
   40,810.16x = 1,754,282,414.50
5. Step 5: Solve for x
   x = 1,754,282,414.50/40,810.16
6. Step 6: Final answer
   x = 42,986.41