Finding the Fourth Proportional to 56,641.98, 78,162.93 and 31,147.86

Step by Step Solution

1. Step 1: Write the proportion equation
   56,641.98 : 78,162.93 = 31,147.86 : x
2. Step 2: Convert to fraction form
   56,641.98/78,162.93 = 31,147.86/x
3. Step 3: Cross multiply
   56,641.98x = 78,162.93 × 31,147.86
4. Step 4: Simplify right side
   56,641.98x = 2,434,608,000.83
5. Step 5: Solve for x
   x = 2,434,608,000.83/56,641.98
6. Step 6: Final answer
   x = 42,982.40