Finding the Fourth Proportional to 1,030.95, 1,422.71 and 558.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,030.95 : 1,422.71 = 558.86 : x
2. Step 2: Convert to fraction form
   1,030.95/1,422.71 = 558.86/x
3. Step 3: Cross multiply
   1,030.95x = 1,422.71 × 558.86
4. Step 4: Simplify right side
   1,030.95x = 795,087.90
5. Step 5: Solve for x
   x = 795,087.90/1,030.95
6. Step 6: Final answer
   x = 771.22