Finding the Fourth Proportional to 142,539.89, 196,706.81 and 78,883.61

Step by Step Solution

1. Step 1: Write the proportion equation
   142,539.89 : 196,706.81 = 78,883.61 : x
2. Step 2: Convert to fraction form
   142,539.89/196,706.81 = 78,883.61/x
3. Step 3: Cross multiply
   142,539.89x = 196,706.81 × 78,883.61
4. Step 4: Simplify right side
   142,539.89x = 15,516,943,381.73
5. Step 5: Solve for x
   x = 15,516,943,381.73/142,539.89
6. Step 6: Final answer
   x = 108,860.36