Finding the Fourth Proportional to 1,030.91, 1,422.71 and 588.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,030.91 : 1,422.71 = 588.90 : x
2. Step 2: Convert to fraction form
   1,030.91/1,422.71 = 588.90/x
3. Step 3: Cross multiply
   1,030.91x = 1,422.71 × 588.90
4. Step 4: Simplify right side
   1,030.91x = 837,841.83
5. Step 5: Solve for x
   x = 837,841.83/1,030.91
6. Step 6: Final answer
   x = 812.72