Finding the Fourth Proportional to 56,751.62, 78,316.31 and 31,260.42

Step by Step Solution

1. Step 1: Write the proportion equation
   56,751.62 : 78,316.31 = 31,260.42 : x
2. Step 2: Convert to fraction form
   56,751.62/78,316.31 = 31,260.42/x
3. Step 3: Cross multiply
   56,751.62x = 78,316.31 × 31,260.42
4. Step 4: Simplify right side
   56,751.62x = 2,448,200,587.15
5. Step 5: Solve for x
   x = 2,448,200,587.15/56,751.62
6. Step 6: Final answer
   x = 43,138.87