Finding the Fourth Proportional to 1,665.69, 2,298.94 and 993.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.69 : 2,298.94 = 993.53 : x
2. Step 2: Convert to fraction form
   1,665.69/2,298.94 = 993.53/x
3. Step 3: Cross multiply
   1,665.69x = 2,298.94 × 993.53
4. Step 4: Simplify right side
   1,665.69x = 2,284,074.71
5. Step 5: Solve for x
   x = 2,284,074.71/1,665.69
6. Step 6: Final answer
   x = 1,371.25