Finding the Fourth Proportional to 56,928.48, 78,562.53 and 31,434.78

Step by Step Solution

1. Step 1: Write the proportion equation
   56,928.48 : 78,562.53 = 31,434.78 : x
2. Step 2: Convert to fraction form
   56,928.48/78,562.53 = 31,434.78/x
3. Step 3: Cross multiply
   56,928.48x = 78,562.53 × 31,434.78
4. Step 4: Simplify right side
   56,928.48x = 2,469,595,846.79
5. Step 5: Solve for x
   x = 2,469,595,846.79/56,928.48
6. Step 6: Final answer
   x = 43,380.67