Finding the Fourth Proportional to 1,664.03, 2,488.43 and 1,247.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,664.03 : 2,488.43 = 1,247.88 : x
2. Step 2: Convert to fraction form
   1,664.03/2,488.43 = 1,247.88/x
3. Step 3: Cross multiply
   1,664.03x = 2,488.43 × 1,247.88
4. Step 4: Simplify right side
   1,664.03x = 3,105,255.79
5. Step 5: Solve for x
   x = 3,105,255.79/1,664.03
6. Step 6: Final answer
   x = 1,866.11