Finding the Fourth Proportional to 1,030.58, 1,421.97 and 588.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,030.58 : 1,421.97 = 588.34 : x
2. Step 2: Convert to fraction form
   1,030.58/1,421.97 = 588.34/x
3. Step 3: Cross multiply
   1,030.58x = 1,421.97 × 588.34
4. Step 4: Simplify right side
   1,030.58x = 836,601.83
5. Step 5: Solve for x
   x = 836,601.83/1,030.58
6. Step 6: Final answer
   x = 811.78