Finding the Fourth Proportional to 142,165.62, 196,184.79 and 78,502.05

Step by Step Solution

1. Step 1: Write the proportion equation
   142,165.62 : 196,184.79 = 78,502.05 : x
2. Step 2: Convert to fraction form
   142,165.62/196,184.79 = 78,502.05/x
3. Step 3: Cross multiply
   142,165.62x = 196,184.79 × 78,502.05
4. Step 4: Simplify right side
   142,165.62x = 15,400,908,193.82
5. Step 5: Solve for x
   x = 15,400,908,193.82/142,165.62
6. Step 6: Final answer
   x = 108,330.75