Finding the Fourth Proportional to 139,529.04, 192,556.56 and 78,281.12

Step by Step Solution

1. Step 1: Write the proportion equation
   139,529.04 : 192,556.56 = 78,281.12 : x
2. Step 2: Convert to fraction form
   139,529.04/192,556.56 = 78,281.12/x
3. Step 3: Cross multiply
   139,529.04x = 192,556.56 × 78,281.12
4. Step 4: Simplify right side
   139,529.04x = 15,073,543,180.15
5. Step 5: Solve for x
   x = 15,073,543,180.15/139,529.04
6. Step 6: Final answer
   x = 108,031.58