Finding the Fourth Proportional to 57,120.72, 78,935.04 and 42,948.96

Step by Step Solution

1. Step 1: Write the proportion equation
   57,120.72 : 78,935.04 = 42,948.96 : x
2. Step 2: Convert to fraction form
   57,120.72/78,935.04 = 42,948.96/x
3. Step 3: Cross multiply
   57,120.72x = 78,935.04 × 42,948.96
4. Step 4: Simplify right side
   57,120.72x = 3,390,177,875.56
5. Step 5: Solve for x
   x = 3,390,177,875.56/57,120.72
6. Step 6: Final answer
   x = 59,351.11