Finding the Fourth Proportional to 5,613.53, 8,421.53 and 1,665.10

Step by Step Solution

1. Step 1: Write the proportion equation
   5,613.53 : 8,421.53 = 1,665.10 : x
2. Step 2: Convert to fraction form
   5,613.53/8,421.53 = 1,665.10/x
3. Step 3: Cross multiply
   5,613.53x = 8,421.53 × 1,665.10
4. Step 4: Simplify right side
   5,613.53x = 14,022,667.98
5. Step 5: Solve for x
   x = 14,022,667.98/5,613.53
6. Step 6: Final answer
   x = 2,498.01