Finding the Fourth Proportional to 10,655.81, 15,981.15 and 3,260.34

Step by Step Solution

1. Step 1: Write the proportion equation
   10,655.81 : 15,981.15 = 3,260.34 : x
2. Step 2: Convert to fraction form
   10,655.81/15,981.15 = 3,260.34/x
3. Step 3: Cross multiply
   10,655.81x = 15,981.15 × 3,260.34
4. Step 4: Simplify right side
   10,655.81x = 52,103,982.59
5. Step 5: Solve for x
   x = 52,103,982.59/10,655.81
6. Step 6: Final answer
   x = 4,889.73