Finding the Fourth Proportional to 1,061.49, 1,593.60 and 818.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.49 : 1,593.60 = 818.17 : x
2. Step 2: Convert to fraction form
   1,061.49/1,593.60 = 818.17/x
3. Step 3: Cross multiply
   1,061.49x = 1,593.60 × 818.17
4. Step 4: Simplify right side
   1,061.49x = 1,303,835.71
5. Step 5: Solve for x
   x = 1,303,835.71/1,061.49
6. Step 6: Final answer
   x = 1,228.31