Finding the Fourth Proportional to 1,030.50, 1,421.91 and 588.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,030.50 : 1,421.91 = 588.33 : x
2. Step 2: Convert to fraction form
   1,030.50/1,421.91 = 588.33/x
3. Step 3: Cross multiply
   1,030.50x = 1,421.91 × 588.33
4. Step 4: Simplify right side
   1,030.50x = 836,552.31
5. Step 5: Solve for x
   x = 836,552.31/1,030.50
6. Step 6: Final answer
   x = 811.79