Finding the Fourth Proportional to 1,488.02, 2,245.36 and 1,428.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.02 : 2,245.36 = 1,428.08 : x
2. Step 2: Convert to fraction form
   1,488.02/2,245.36 = 1,428.08/x
3. Step 3: Cross multiply
   1,488.02x = 2,245.36 × 1,428.08
4. Step 4: Simplify right side
   1,488.02x = 3,206,546.57
5. Step 5: Solve for x
   x = 3,206,546.57/1,488.02
6. Step 6: Final answer
   x = 2,154.91