Finding the Fourth Proportional to 1,488.58, 2,233.31 and 666.70

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.58 : 2,233.31 = 666.70 : x
2. Step 2: Convert to fraction form
   1,488.58/2,233.31 = 666.70/x
3. Step 3: Cross multiply
   1,488.58x = 2,233.31 × 666.70
4. Step 4: Simplify right side
   1,488.58x = 1,488,938.86
5. Step 5: Solve for x
   x = 1,488,938.86/1,488.58
6. Step 6: Final answer
   x = 1,000.24