Finding the Fourth Proportional to 142,079.49, 196,068.72 and 78,417.29

Step by Step Solution

1. Step 1: Write the proportion equation
   142,079.49 : 196,068.72 = 78,417.29 : x
2. Step 2: Convert to fraction form
   142,079.49/196,068.72 = 78,417.29/x
3. Step 3: Cross multiply
   142,079.49x = 196,068.72 × 78,417.29
4. Step 4: Simplify right side
   142,079.49x = 15,375,177,676.17
5. Step 5: Solve for x
   x = 15,375,177,676.17/142,079.49
6. Step 6: Final answer
   x = 108,215.33