Finding the Fourth Proportional to 139,425.10, 192,405.98 and 78,995.62

Step by Step Solution

1. Step 1: Write the proportion equation
   139,425.10 : 192,405.98 = 78,995.62 : x
2. Step 2: Convert to fraction form
   139,425.10/192,405.98 = 78,995.62/x
3. Step 3: Cross multiply
   139,425.10x = 192,405.98 × 78,995.62
4. Step 4: Simplify right side
   139,425.10x = 15,199,229,681.81
5. Step 5: Solve for x
   x = 15,199,229,681.81/139,425.10
6. Step 6: Final answer
   x = 109,013.58