Finding the Fourth Proportional to 1,488.60, 2,055.30 and 1,330.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.60 : 2,055.30 = 1,330.76 : x
2. Step 2: Convert to fraction form
   1,488.60/2,055.30 = 1,330.76/x
3. Step 3: Cross multiply
   1,488.60x = 2,055.30 × 1,330.76
4. Step 4: Simplify right side
   1,488.60x = 2,735,111.03
5. Step 5: Solve for x
   x = 2,735,111.03/1,488.60
6. Step 6: Final answer
   x = 1,837.37