Finding the Fourth Proportional to 1,488.86, 2,230.30 and 709.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.86 : 2,230.30 = 709.61 : x
2. Step 2: Convert to fraction form
   1,488.86/2,230.30 = 709.61/x
3. Step 3: Cross multiply
   1,488.86x = 2,230.30 × 709.61
4. Step 4: Simplify right side
   1,488.86x = 1,582,639.63
5. Step 5: Solve for x
   x = 1,582,639.63/1,488.86
6. Step 6: Final answer
   x = 1,062.99