Finding the Fourth Proportional to 1,030.71, 1,422.53 and 588.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,030.71 : 1,422.53 = 588.55 : x
2. Step 2: Convert to fraction form
   1,030.71/1,422.53 = 588.55/x
3. Step 3: Cross multiply
   1,030.71x = 1,422.53 × 588.55
4. Step 4: Simplify right side
   1,030.71x = 837,230.03
5. Step 5: Solve for x
   x = 837,230.03/1,030.71
6. Step 6: Final answer
   x = 812.28