Finding the Fourth Proportional to 8,521.86, 12,784.71 and 2,599.27

Step by Step Solution

1. Step 1: Write the proportion equation
   8,521.86 : 12,784.71 = 2,599.27 : x
2. Step 2: Convert to fraction form
   8,521.86/12,784.71 = 2,599.27/x
3. Step 3: Cross multiply
   8,521.86x = 12,784.71 × 2,599.27
4. Step 4: Simplify right side
   8,521.86x = 33,230,913.16
5. Step 5: Solve for x
   x = 33,230,913.16/8,521.86
6. Step 6: Final answer
   x = 3,899.49