Finding the Fourth Proportional to 75,679.78, 104,440.17 and 42,147.94

Step by Step Solution

1. Step 1: Write the proportion equation
   75,679.78 : 104,440.17 = 42,147.94 : x
2. Step 2: Convert to fraction form
   75,679.78/104,440.17 = 42,147.94/x
3. Step 3: Cross multiply
   75,679.78x = 104,440.17 × 42,147.94
4. Step 4: Simplify right side
   75,679.78x = 4,401,938,018.75
5. Step 5: Solve for x
   x = 4,401,938,018.75/75,679.78
6. Step 6: Final answer
   x = 58,165.31