Finding the Fourth Proportional to 10,654.89, 15,985.20 and 3,259.15

Step by Step Solution

1. Step 1: Write the proportion equation
   10,654.89 : 15,985.20 = 3,259.15 : x
2. Step 2: Convert to fraction form
   10,654.89/15,985.20 = 3,259.15/x
3. Step 3: Cross multiply
   10,654.89x = 15,985.20 × 3,259.15
4. Step 4: Simplify right side
   10,654.89x = 52,098,136.84
5. Step 5: Solve for x
   x = 52,098,136.84/10,654.89
6. Step 6: Final answer
   x = 4,889.60