Finding the Fourth Proportional to 71,681.50, 98,923 and 39,418.58

Step by Step Solution

1. Step 1: Write the proportion equation
   71,681.50 : 98,923 = 39,418.58 : x
2. Step 2: Convert to fraction form
   71,681.50/98,923 = 39,418.58/x
3. Step 3: Cross multiply
   71,681.50x = 98,923 × 39,418.58
4. Step 4: Simplify right side
   71,681.50x = 3,899,404,189.34
5. Step 5: Solve for x
   x = 3,899,404,189.34/71,681.50
6. Step 6: Final answer
   x = 54,399.03