Finding the Fourth Proportional to 6,499.66, 8,969.50 and 3,515.50

Step by Step Solution

1. Step 1: Write the proportion equation
   6,499.66 : 8,969.50 = 3,515.50 : x
2. Step 2: Convert to fraction form
   6,499.66/8,969.50 = 3,515.50/x
3. Step 3: Cross multiply
   6,499.66x = 8,969.50 × 3,515.50
4. Step 4: Simplify right side
   6,499.66x = 31,532,277.25
5. Step 5: Solve for x
   x = 31,532,277.25/6,499.66
6. Step 6: Final answer
   x = 4,851.37