Finding the Fourth Proportional to 75,678, 104,436.36 and 42,144.72

Step by Step Solution

1. Step 1: Write the proportion equation
   75,678 : 104,436.36 = 42,144.72 : x
2. Step 2: Convert to fraction form
   75,678/104,436.36 = 42,144.72/x
3. Step 3: Cross multiply
   75,678x = 104,436.36 × 42,144.72
4. Step 4: Simplify right side
   75,678x = 4,401,441,150.02
5. Step 5: Solve for x
   x = 4,401,441,150.02/75,678
6. Step 6: Final answer
   x = 58,160.11