Finding the Fourth Proportional to 139,230.46, 192,105.09 and 78,801.10

Step by Step Solution

1. Step 1: Write the proportion equation
   139,230.46 : 192,105.09 = 78,801.10 : x
2. Step 2: Convert to fraction form
   139,230.46/192,105.09 = 78,801.10/x
3. Step 3: Cross multiply
   139,230.46x = 192,105.09 × 78,801.10
4. Step 4: Simplify right side
   139,230.46x = 15,138,091,927.34
5. Step 5: Solve for x
   x = 15,138,091,927.34/139,230.46
6. Step 6: Final answer
   x = 108,726.87