Finding the Fourth Proportional to 1,030.46, 1,422.28 and 588.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,030.46 : 1,422.28 = 588.61 : x
2. Step 2: Convert to fraction form
   1,030.46/1,422.28 = 588.61/x
3. Step 3: Cross multiply
   1,030.46x = 1,422.28 × 588.61
4. Step 4: Simplify right side
   1,030.46x = 837,168.23
5. Step 5: Solve for x
   x = 837,168.23/1,030.46
6. Step 6: Final answer
   x = 812.43