Finding the Fourth Proportional to 56,753.75, 78,320.72 and 31,260.69

Step by Step Solution

1. Step 1: Write the proportion equation
   56,753.75 : 78,320.72 = 31,260.69 : x
2. Step 2: Convert to fraction form
   56,753.75/78,320.72 = 31,260.69/x
3. Step 3: Cross multiply
   56,753.75x = 78,320.72 × 31,260.69
4. Step 4: Simplify right side
   56,753.75x = 2,448,359,748.50
5. Step 5: Solve for x
   x = 2,448,359,748.50/56,753.75
6. Step 6: Final answer
   x = 43,140.05