Finding the Fourth Proportional to 139,975.43, 193,169.00 and 78,722.79

Step by Step Solution

1. Step 1: Write the proportion equation
   139,975.43 : 193,169.00 = 78,722.79 : x
2. Step 2: Convert to fraction form
   139,975.43/193,169.00 = 78,722.79/x
3. Step 3: Cross multiply
   139,975.43x = 193,169.00 × 78,722.79
4. Step 4: Simplify right side
   139,975.43x = 15,206,802,227.90
5. Step 5: Solve for x
   x = 15,206,802,227.90/139,975.43
6. Step 6: Final answer
   x = 108,639.09