Finding the Fourth Proportional to 71,678.07, 98,921.72 and 39,849.93

Step by Step Solution

1. Step 1: Write the proportion equation
   71,678.07 : 98,921.72 = 39,849.93 : x
2. Step 2: Convert to fraction form
   71,678.07/98,921.72 = 39,849.93/x
3. Step 3: Cross multiply
   71,678.07x = 98,921.72 × 39,849.93
4. Step 4: Simplify right side
   71,678.07x = 3,942,023,617.48
5. Step 5: Solve for x
   x = 3,942,023,617.48/71,678.07
6. Step 6: Final answer
   x = 54,996.23