Finding the Fourth Proportional to 141,969.60, 195,915.24 and 78,309

Step by Step Solution

1. Step 1: Write the proportion equation
   141,969.60 : 195,915.24 = 78,309 : x
2. Step 2: Convert to fraction form
   141,969.60/195,915.24 = 78,309/x
3. Step 3: Cross multiply
   141,969.60x = 195,915.24 × 78,309
4. Step 4: Simplify right side
   141,969.60x = 15,341,926,529.16
5. Step 5: Solve for x
   x = 15,341,926,529.16/141,969.60
6. Step 6: Final answer
   x = 108,064.87