Finding the Fourth Proportional to 1,669.10, 2,500.70 and 1,488.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,669.10 : 2,500.70 = 1,488.10 : x
2. Step 2: Convert to fraction form
   1,669.10/2,500.70 = 1,488.10/x
3. Step 3: Cross multiply
   1,669.10x = 2,500.70 × 1,488.10
4. Step 4: Simplify right side
   1,669.10x = 3,721,291.67
5. Step 5: Solve for x
   x = 3,721,291.67/1,669.10
6. Step 6: Final answer
   x = 2,229.52