Finding the Fourth Proportional to 1,488.31, 2,057.76 and 1,303.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.31 : 2,057.76 = 1,303.76 : x
2. Step 2: Convert to fraction form
   1,488.31/2,057.76 = 1,303.76/x
3. Step 3: Cross multiply
   1,488.31x = 2,057.76 × 1,303.76
4. Step 4: Simplify right side
   1,488.31x = 2,682,830.32
5. Step 5: Solve for x
   x = 2,682,830.32/1,488.31
6. Step 6: Final answer
   x = 1,802.60