Finding the Fourth Proportional to 142,108.53, 196,109.31 and 78,445.86

Step by Step Solution

1. Step 1: Write the proportion equation
   142,108.53 : 196,109.31 = 78,445.86 : x
2. Step 2: Convert to fraction form
   142,108.53/196,109.31 = 78,445.86/x
3. Step 3: Cross multiply
   142,108.53x = 196,109.31 × 78,445.86
4. Step 4: Simplify right side
   142,108.53x = 15,383,963,476.96
5. Step 5: Solve for x
   x = 15,383,963,476.96/142,108.53
6. Step 6: Final answer
   x = 108,255.03