Finding the Fourth Proportional to 57,123.12, 78,938.36 and 42,951.36

Step by Step Solution

1. Step 1: Write the proportion equation
   57,123.12 : 78,938.36 = 42,951.36 : x
2. Step 2: Convert to fraction form
   57,123.12/78,938.36 = 42,951.36/x
3. Step 3: Cross multiply
   57,123.12x = 78,938.36 × 42,951.36
4. Step 4: Simplify right side
   57,123.12x = 3,390,509,918.17
5. Step 5: Solve for x
   x = 3,390,509,918.17/57,123.12
6. Step 6: Final answer
   x = 59,354.42