Finding the Fourth Proportional to 1,665.88, 2,298.91 and 1,002.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.88 : 2,298.91 = 1,002.60 : x
2. Step 2: Convert to fraction form
   1,665.88/2,298.91 = 1,002.60/x
3. Step 3: Cross multiply
   1,665.88x = 2,298.91 × 1,002.60
4. Step 4: Simplify right side
   1,665.88x = 2,304,896.53
5. Step 5: Solve for x
   x = 2,304,896.53/1,665.88
6. Step 6: Final answer
   x = 1,383.59