Finding the Fourth Proportional to 8,151.99, 12,221.51 and 3,531.75

Step by Step Solution

1. Step 1: Write the proportion equation
   8,151.99 : 12,221.51 = 3,531.75 : x
2. Step 2: Convert to fraction form
   8,151.99/12,221.51 = 3,531.75/x
3. Step 3: Cross multiply
   8,151.99x = 12,221.51 × 3,531.75
4. Step 4: Simplify right side
   8,151.99x = 43,163,300.28
5. Step 5: Solve for x
   x = 43,163,300.28/8,151.99
6. Step 6: Final answer
   x = 5,294.82