Finding the Fourth Proportional to 139,320.52, 192,267.07 and 78,069.29

Step by Step Solution

1. Step 1: Write the proportion equation
   139,320.52 : 192,267.07 = 78,069.29 : x
2. Step 2: Convert to fraction form
   139,320.52/192,267.07 = 78,069.29/x
3. Step 3: Cross multiply
   139,320.52x = 192,267.07 × 78,069.29
4. Step 4: Simplify right side
   139,320.52x = 15,010,154,440.38
5. Step 5: Solve for x
   x = 15,010,154,440.38/139,320.52
6. Step 6: Final answer
   x = 107,738.29