Finding the Fourth Proportional to 1,140.22, 1,572.72 and 698.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,140.22 : 1,572.72 = 698.34 : x
2. Step 2: Convert to fraction form
   1,140.22/1,572.72 = 698.34/x
3. Step 3: Cross multiply
   1,140.22x = 1,572.72 × 698.34
4. Step 4: Simplify right side
   1,140.22x = 1,098,293.28
5. Step 5: Solve for x
   x = 1,098,293.28/1,140.22
6. Step 6: Final answer
   x = 963.23