Finding the Fourth Proportional to 56,350.72, 77,760.54 and 30,857.39

Step by Step Solution

1. Step 1: Write the proportion equation
   56,350.72 : 77,760.54 = 30,857.39 : x
2. Step 2: Convert to fraction form
   56,350.72/77,760.54 = 30,857.39/x
3. Step 3: Cross multiply
   56,350.72x = 77,760.54 × 30,857.39
4. Step 4: Simplify right side
   56,350.72x = 2,399,486,766.30
5. Step 5: Solve for x
   x = 2,399,486,766.30/56,350.72
6. Step 6: Final answer
   x = 42,581.30