Finding the Fourth Proportional to 78,288.10, 107,984.06 and 49,981.02

Step by Step Solution

1. Step 1: Write the proportion equation
   78,288.10 : 107,984.06 = 49,981.02 : x
2. Step 2: Convert to fraction form
   78,288.10/107,984.06 = 49,981.02/x
3. Step 3: Cross multiply
   78,288.10x = 107,984.06 × 49,981.02
4. Step 4: Simplify right side
   78,288.10x = 5,397,153,462.54
5. Step 5: Solve for x
   x = 5,397,153,462.54/78,288.10
6. Step 6: Final answer
   x = 68,939.64