Finding the Fourth Proportional to 1,069.10, 1,603.91 and 630.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,069.10 : 1,603.91 = 630.72 : x
2. Step 2: Convert to fraction form
   1,069.10/1,603.91 = 630.72/x
3. Step 3: Cross multiply
   1,069.10x = 1,603.91 × 630.72
4. Step 4: Simplify right side
   1,069.10x = 1,011,618.12
5. Step 5: Solve for x
   x = 1,011,618.12/1,069.10
6. Step 6: Final answer
   x = 946.23