Finding the Fourth Proportional to 3,810.51, 5,709.43 and 3,666.53

Step by Step Solution

1. Step 1: Write the proportion equation
   3,810.51 : 5,709.43 = 3,666.53 : x
2. Step 2: Convert to fraction form
   3,810.51/5,709.43 = 3,666.53/x
3. Step 3: Cross multiply
   3,810.51x = 5,709.43 × 3,666.53
4. Step 4: Simplify right side
   3,810.51x = 20,933,796.38
5. Step 5: Solve for x
   x = 20,933,796.38/3,810.51
6. Step 6: Final answer
   x = 5,493.70