Finding the Fourth Proportional to 72,300.78, 108,309.92 and 49,807.49

Step by Step Solution

1. Step 1: Write the proportion equation
   72,300.78 : 108,309.92 = 49,807.49 : x
2. Step 2: Convert to fraction form
   72,300.78/108,309.92 = 49,807.49/x
3. Step 3: Cross multiply
   72,300.78x = 108,309.92 × 49,807.49
4. Step 4: Simplify right side
   72,300.78x = 5,394,644,715.75
5. Step 5: Solve for x
   x = 5,394,644,715.75/72,300.78
6. Step 6: Final answer
   x = 74,613.92