Finding the Fourth Proportional to 57,024, 78,693.12 and 31,878.72

Step by Step Solution

1. Step 1: Write the proportion equation
   57,024 : 78,693.12 = 31,878.72 : x
2. Step 2: Convert to fraction form
   57,024/78,693.12 = 31,878.72/x
3. Step 3: Cross multiply
   57,024x = 78,693.12 × 31,878.72
4. Step 4: Simplify right side
   57,024x = 2,508,635,938.41
5. Step 5: Solve for x
   x = 2,508,635,938.41/57,024
6. Step 6: Final answer
   x = 43,992.63