Finding the Fourth Proportional to 1,663.06, 2,295.17 and 917.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,663.06 : 2,295.17 = 917.18 : x
2. Step 2: Convert to fraction form
   1,663.06/2,295.17 = 917.18/x
3. Step 3: Cross multiply
   1,663.06x = 2,295.17 × 917.18
4. Step 4: Simplify right side
   1,663.06x = 2,105,084.02
5. Step 5: Solve for x
   x = 2,105,084.02/1,663.06
6. Step 6: Final answer
   x = 1,265.79