Finding the Fourth Proportional to 142,258.70, 196,314.71 and 77,726.55

Step by Step Solution

1. Step 1: Write the proportion equation
   142,258.70 : 196,314.71 = 77,726.55 : x
2. Step 2: Convert to fraction form
   142,258.70/196,314.71 = 77,726.55/x
3. Step 3: Cross multiply
   142,258.70x = 196,314.71 × 77,726.55
4. Step 4: Simplify right side
   142,258.70x = 15,258,865,470.10
5. Step 5: Solve for x
   x = 15,258,865,470.10/142,258.70
6. Step 6: Final answer
   x = 107,261.39