Finding the Fourth Proportional to 103,878.53, 143,352.32 and 56,131.86

Step by Step Solution

1. Step 1: Write the proportion equation
   103,878.53 : 143,352.32 = 56,131.86 : x
2. Step 2: Convert to fraction form
   103,878.53/143,352.32 = 56,131.86/x
3. Step 3: Cross multiply
   103,878.53x = 143,352.32 × 56,131.86
4. Step 4: Simplify right side
   103,878.53x = 8,046,632,613.83
5. Step 5: Solve for x
   x = 8,046,632,613.83/103,878.53
6. Step 6: Final answer
   x = 77,461.94