Finding the Fourth Proportional to 1,105.19, 1,524.53 and 690.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.19 : 1,524.53 = 690.47 : x
2. Step 2: Convert to fraction form
   1,105.19/1,524.53 = 690.47/x
3. Step 3: Cross multiply
   1,105.19x = 1,524.53 × 690.47
4. Step 4: Simplify right side
   1,105.19x = 1,052,638.17
5. Step 5: Solve for x
   x = 1,052,638.17/1,105.19
6. Step 6: Final answer
   x = 952.45