Finding the Fourth Proportional to 1,663.61, 2,291.00 and 1,658.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,663.61 : 2,291.00 = 1,658.57 : x
2. Step 2: Convert to fraction form
   1,663.61/2,291.00 = 1,658.57/x
3. Step 3: Cross multiply
   1,663.61x = 2,291.00 × 1,658.57
4. Step 4: Simplify right side
   1,663.61x = 3,799,764.12
5. Step 5: Solve for x
   x = 3,799,764.12/1,663.61
6. Step 6: Final answer
   x = 2,284.05