Finding the Fourth Proportional to 56,641.63, 78,167.42 and 31,149.04

Step by Step Solution

1. Step 1: Write the proportion equation
   56,641.63 : 78,167.42 = 31,149.04 : x
2. Step 2: Convert to fraction form
   56,641.63/78,167.42 = 31,149.04/x
3. Step 3: Cross multiply
   56,641.63x = 78,167.42 × 31,149.04
4. Step 4: Simplify right side
   56,641.63x = 2,434,840,092.28
5. Step 5: Solve for x
   x = 2,434,840,092.28/56,641.63
6. Step 6: Final answer
   x = 42,986.76