Finding the Fourth Proportional to 142,578.52, 196,755.42 and 78,912.52

Step by Step Solution

1. Step 1: Write the proportion equation
   142,578.52 : 196,755.42 = 78,912.52 : x
2. Step 2: Convert to fraction form
   142,578.52/196,755.42 = 78,912.52/x
3. Step 3: Cross multiply
   142,578.52x = 196,755.42 × 78,912.52
4. Step 4: Simplify right side
   142,578.52x = 15,526,466,015.86
5. Step 5: Solve for x
   x = 15,526,466,015.86/142,578.52
6. Step 6: Final answer
   x = 108,897.65