Finding the Fourth Proportional to 8,526.29, 12,789.50 and 3,259.88

Step by Step Solution

1. Step 1: Write the proportion equation
   8,526.29 : 12,789.50 = 3,259.88 : x
2. Step 2: Convert to fraction form
   8,526.29/12,789.50 = 3,259.88/x
3. Step 3: Cross multiply
   8,526.29x = 12,789.50 × 3,259.88
4. Step 4: Simplify right side
   8,526.29x = 41,692,155.01
5. Step 5: Solve for x
   x = 41,692,155.01/8,526.29
6. Step 6: Final answer
   x = 4,889.84