Finding the Fourth Proportional to 139,632.78, 192,693.72 and 75,970.56

Step by Step Solution

1. Step 1: Write the proportion equation
   139,632.78 : 192,693.72 = 75,970.56 : x
2. Step 2: Convert to fraction form
   139,632.78/192,693.72 = 75,970.56/x
3. Step 3: Cross multiply
   139,632.78x = 192,693.72 × 75,970.56
4. Step 4: Simplify right side
   139,632.78x = 14,639,049,816.88
5. Step 5: Solve for x
   x = 14,639,049,816.88/139,632.78
6. Step 6: Final answer
   x = 104,839.64