Finding the Fourth Proportional to 71,667.92, 98,902.91 and 39,403.89

Step by Step Solution

1. Step 1: Write the proportion equation
   71,667.92 : 98,902.91 = 39,403.89 : x
2. Step 2: Convert to fraction form
   71,667.92/98,902.91 = 39,403.89/x
3. Step 3: Cross multiply
   71,667.92x = 98,902.91 × 39,403.89
4. Step 4: Simplify right side
   71,667.92x = 3,897,159,189.30
5. Step 5: Solve for x
   x = 3,897,159,189.30/71,667.92
6. Step 6: Final answer
   x = 54,378.02