Finding the Fourth Proportional to 75,123.46, 103,676.12 and 42,858.78

Step by Step Solution

1. Step 1: Write the proportion equation
   75,123.46 : 103,676.12 = 42,858.78 : x
2. Step 2: Convert to fraction form
   75,123.46/103,676.12 = 42,858.78/x
3. Step 3: Cross multiply
   75,123.46x = 103,676.12 × 42,858.78
4. Step 4: Simplify right side
   75,123.46x = 4,443,432,018.33
5. Step 5: Solve for x
   x = 4,443,432,018.33/75,123.46
6. Step 6: Final answer
   x = 59,148.39