Finding the Fourth Proportional to 142,184.68, 196,213.78 and 78,521.96

Step by Step Solution

1. Step 1: Write the proportion equation
   142,184.68 : 196,213.78 = 78,521.96 : x
2. Step 2: Convert to fraction form
   142,184.68/196,213.78 = 78,521.96/x
3. Step 3: Cross multiply
   142,184.68x = 196,213.78 × 78,521.96
4. Step 4: Simplify right side
   142,184.68x = 15,407,090,584.61
5. Step 5: Solve for x
   x = 15,407,090,584.61/142,184.68
6. Step 6: Final answer
   x = 108,359.71