Finding the Fourth Proportional to 142,092.61, 196,073.82 and 78,426.28

Step by Step Solution

1. Step 1: Write the proportion equation
   142,092.61 : 196,073.82 = 78,426.28 : x
2. Step 2: Convert to fraction form
   142,092.61/196,073.82 = 78,426.28/x
3. Step 3: Cross multiply
   142,092.61x = 196,073.82 × 78,426.28
4. Step 4: Simplify right side
   142,092.61x = 15,377,340,307.99
5. Step 5: Solve for x
   x = 15,377,340,307.99/142,092.61
6. Step 6: Final answer
   x = 108,220.55