Finding the Fourth Proportional to 1,665.18, 2,298.78 and 1,136.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.18 : 2,298.78 = 1,136.82 : x
2. Step 2: Convert to fraction form
   1,665.18/2,298.78 = 1,136.82/x
3. Step 3: Cross multiply
   1,665.18x = 2,298.78 × 1,136.82
4. Step 4: Simplify right side
   1,665.18x = 2,613,299.08
5. Step 5: Solve for x
   x = 2,613,299.08/1,665.18
6. Step 6: Final answer
   x = 1,569.38