Finding the Fourth Proportional to 1,162.31, 1,603.89 and 690.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,162.31 : 1,603.89 = 690.17 : x
2. Step 2: Convert to fraction form
   1,162.31/1,603.89 = 690.17/x
3. Step 3: Cross multiply
   1,162.31x = 1,603.89 × 690.17
4. Step 4: Simplify right side
   1,162.31x = 1,106,948.74
5. Step 5: Solve for x
   x = 1,106,948.74/1,162.31
6. Step 6: Final answer
   x = 952.37