Finding the Fourth Proportional to 139,426.26, 192,392.62 and 78,983.96

Step by Step Solution

1. Step 1: Write the proportion equation
   139,426.26 : 192,392.62 = 78,983.96 : x
2. Step 2: Convert to fraction form
   139,426.26/192,392.62 = 78,983.96/x
3. Step 3: Cross multiply
   139,426.26x = 192,392.62 × 78,983.96
4. Step 4: Simplify right side
   139,426.26x = 15,195,931,002.38
5. Step 5: Solve for x
   x = 15,195,931,002.38/139,426.26
6. Step 6: Final answer
   x = 108,989.02