Finding the Fourth Proportional to 6,464.50, 8,921.01 and 3,520.50

Step by Step Solution

1. Step 1: Write the proportion equation
   6,464.50 : 8,921.01 = 3,520.50 : x
2. Step 2: Convert to fraction form
   6,464.50/8,921.01 = 3,520.50/x
3. Step 3: Cross multiply
   6,464.50x = 8,921.01 × 3,520.50
4. Step 4: Simplify right side
   6,464.50x = 31,406,415.71
5. Step 5: Solve for x
   x = 31,406,415.71/6,464.50
6. Step 6: Final answer
   x = 4,858.29