Finding the Fourth Proportional to 1,030.55, 1,422.18 and 588.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,030.55 : 1,422.18 = 588.51 : x
2. Step 2: Convert to fraction form
   1,030.55/1,422.18 = 588.51/x
3. Step 3: Cross multiply
   1,030.55x = 1,422.18 × 588.51
4. Step 4: Simplify right side
   1,030.55x = 836,967.15
5. Step 5: Solve for x
   x = 836,967.15/1,030.55
6. Step 6: Final answer
   x = 812.16