Finding the Fourth Proportional to 1,030.38, 1,421.91 and 588.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,030.38 : 1,421.91 = 588.27 : x
2. Step 2: Convert to fraction form
   1,030.38/1,421.91 = 588.27/x
3. Step 3: Cross multiply
   1,030.38x = 1,421.91 × 588.27
4. Step 4: Simplify right side
   1,030.38x = 836,467.00
5. Step 5: Solve for x
   x = 836,467.00/1,030.38
6. Step 6: Final answer
   x = 811.80