Finding the Fourth Proportional to 1,109.90, 1,532.43 and 690.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109.90 : 1,532.43 = 690.42 : x
2. Step 2: Convert to fraction form
   1,109.90/1,532.43 = 690.42/x
3. Step 3: Cross multiply
   1,109.90x = 1,532.43 × 690.42
4. Step 4: Simplify right side
   1,109.90x = 1,058,020.32
5. Step 5: Solve for x
   x = 1,058,020.32/1,109.90
6. Step 6: Final answer
   x = 953.26