Finding the Fourth Proportional to 142,108.29, 196,109.91 and 78,445.94

Step by Step Solution

1. Step 1: Write the proportion equation
   142,108.29 : 196,109.91 = 78,445.94 : x
2. Step 2: Convert to fraction form
   142,108.29/196,109.91 = 78,445.94/x
3. Step 3: Cross multiply
   142,108.29x = 196,109.91 × 78,445.94
4. Step 4: Simplify right side
   142,108.29x = 15,384,025,252.72
5. Step 5: Solve for x
   x = 15,384,025,252.72/142,108.29
6. Step 6: Final answer
   x = 108,255.65