Finding the Fourth Proportional to 1,030.72, 1,422.36 and 564.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,030.72 : 1,422.36 = 564.96 : x
2. Step 2: Convert to fraction form
   1,030.72/1,422.36 = 564.96/x
3. Step 3: Cross multiply
   1,030.72x = 1,422.36 × 564.96
4. Step 4: Simplify right side
   1,030.72x = 803,576.51
5. Step 5: Solve for x
   x = 803,576.51/1,030.72
6. Step 6: Final answer
   x = 779.63