Finding the Fourth Proportional to 139,304.05, 192,246.04 and 78,866.71

Step by Step Solution

1. Step 1: Write the proportion equation
   139,304.05 : 192,246.04 = 78,866.71 : x
2. Step 2: Convert to fraction form
   139,304.05/192,246.04 = 78,866.71/x
3. Step 3: Cross multiply
   139,304.05x = 192,246.04 × 78,866.71
4. Step 4: Simplify right side
   139,304.05x = 15,161,812,303.30
5. Step 5: Solve for x
   x = 15,161,812,303.30/139,304.05
6. Step 6: Final answer
   x = 108,839.71