Finding the Fourth Proportional to 142,578.53, 196,755.99 and 78,914.96

Step by Step Solution

1. Step 1: Write the proportion equation
   142,578.53 : 196,755.99 = 78,914.96 : x
2. Step 2: Convert to fraction form
   142,578.53/196,755.99 = 78,914.96/x
3. Step 3: Cross multiply
   142,578.53x = 196,755.99 × 78,914.96
4. Step 4: Simplify right side
   142,578.53x = 15,526,991,080.61
5. Step 5: Solve for x
   x = 15,526,991,080.61/142,578.53
6. Step 6: Final answer
   x = 108,901.33