Finding the Fourth Proportional to 141,870.72, 195,778.98 and 77,340.64

Step by Step Solution

1. Step 1: Write the proportion equation
   141,870.72 : 195,778.98 = 77,340.64 : x
2. Step 2: Convert to fraction form
   141,870.72/195,778.98 = 77,340.64/x
3. Step 3: Cross multiply
   141,870.72x = 195,778.98 × 77,340.64
4. Step 4: Simplify right side
   141,870.72x = 15,141,671,611.75
5. Step 5: Solve for x
   x = 15,141,671,611.75/141,870.72
6. Step 6: Final answer
   x = 106,728.66