Finding the Fourth Proportional to 1,026.50, 1,531.79 and 917.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,026.50 : 1,531.79 = 917.16 : x
2. Step 2: Convert to fraction form
   1,026.50/1,531.79 = 917.16/x
3. Step 3: Cross multiply
   1,026.50x = 1,531.79 × 917.16
4. Step 4: Simplify right side
   1,026.50x = 1,404,896.52
5. Step 5: Solve for x
   x = 1,404,896.52/1,026.50
6. Step 6: Final answer
   x = 1,368.63