Finding the Fourth Proportional to 1,030.89, 1,422.62 and 565.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,030.89 : 1,422.62 = 565.15 : x
2. Step 2: Convert to fraction form
   1,030.89/1,422.62 = 565.15/x
3. Step 3: Cross multiply
   1,030.89x = 1,422.62 × 565.15
4. Step 4: Simplify right side
   1,030.89x = 803,990.87
5. Step 5: Solve for x
   x = 803,990.87/1,030.89
6. Step 6: Final answer
   x = 779.90