Finding the Fourth Proportional to 11,026.35, 16,540.52 and 3,128.99

Step by Step Solution

1. Step 1: Write the proportion equation
   11,026.35 : 16,540.52 = 3,128.99 : x
2. Step 2: Convert to fraction form
   11,026.35/16,540.52 = 3,128.99/x
3. Step 3: Cross multiply
   11,026.35x = 16,540.52 × 3,128.99
4. Step 4: Simplify right side
   11,026.35x = 51,755,023.33
5. Step 5: Solve for x
   x = 51,755,023.33/11,026.35
6. Step 6: Final answer
   x = 4,693.76