Finding the Fourth Proportional to 142,348.52, 196,439.94 and 78,685.16

Step by Step Solution

1. Step 1: Write the proportion equation
   142,348.52 : 196,439.94 = 78,685.16 : x
2. Step 2: Convert to fraction form
   142,348.52/196,439.94 = 78,685.16/x
3. Step 3: Cross multiply
   142,348.52x = 196,439.94 × 78,685.16
4. Step 4: Simplify right side
   142,348.52x = 15,456,908,109.29
5. Step 5: Solve for x
   x = 15,456,908,109.29/142,348.52
6. Step 6: Final answer
   x = 108,584.96