Finding the Fourth Proportional to 142,077.16, 196,066.08 and 78,414.50

Step by Step Solution

1. Step 1: Write the proportion equation
   142,077.16 : 196,066.08 = 78,414.50 : x
2. Step 2: Convert to fraction form
   142,077.16/196,066.08 = 78,414.50/x
3. Step 3: Cross multiply
   142,077.16x = 196,066.08 × 78,414.50
4. Step 4: Simplify right side
   142,077.16x = 15,374,423,238.09
5. Step 5: Solve for x
   x = 15,374,423,238.09/142,077.16
6. Step 6: Final answer
   x = 108,211.79