Finding the Fourth Proportional to 2,386.17, 3,290.70 and 1,488.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,386.17 : 3,290.70 = 1,488.75 : x
2. Step 2: Convert to fraction form
   2,386.17/3,290.70 = 1,488.75/x
3. Step 3: Cross multiply
   2,386.17x = 3,290.70 × 1,488.75
4. Step 4: Simplify right side
   2,386.17x = 4,899,029.63
5. Step 5: Solve for x
   x = 4,899,029.63/2,386.17
6. Step 6: Final answer
   x = 2,053.09