Finding the Fourth Proportional to 142,334.10, 196,418.25 and 78,674.58

Step by Step Solution

1. Step 1: Write the proportion equation
   142,334.10 : 196,418.25 = 78,674.58 : x
2. Step 2: Convert to fraction form
   142,334.10/196,418.25 = 78,674.58/x
3. Step 3: Cross multiply
   142,334.10x = 196,418.25 × 78,674.58
4. Step 4: Simplify right side
   142,334.10x = 15,453,123,323.09
5. Step 5: Solve for x
   x = 15,453,123,323.09/142,334.10
6. Step 6: Final answer
   x = 108,569.37