Finding the Fourth Proportional to 1,030.18, 1,421.52 and 587.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,030.18 : 1,421.52 = 587.98 : x
2. Step 2: Convert to fraction form
   1,030.18/1,421.52 = 587.98/x
3. Step 3: Cross multiply
   1,030.18x = 1,421.52 × 587.98
4. Step 4: Simplify right side
   1,030.18x = 835,825.33
5. Step 5: Solve for x
   x = 835,825.33/1,030.18
6. Step 6: Final answer
   x = 811.34