Finding the Fourth Proportional to 1,030.79, 1,422.42 and 588.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,030.79 : 1,422.42 = 588.71 : x
2. Step 2: Convert to fraction form
   1,030.79/1,422.42 = 588.71/x
3. Step 3: Cross multiply
   1,030.79x = 1,422.42 × 588.71
4. Step 4: Simplify right side
   1,030.79x = 837,392.88
5. Step 5: Solve for x
   x = 837,392.88/1,030.79
6. Step 6: Final answer
   x = 812.38