Finding the Fourth Proportional to 1,665.92, 2,299.52 and 1,045.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.92 : 2,299.52 = 1,045.12 : x
2. Step 2: Convert to fraction form
   1,665.92/2,299.52 = 1,045.12/x
3. Step 3: Cross multiply
   1,665.92x = 2,299.52 × 1,045.12
4. Step 4: Simplify right side
   1,665.92x = 2,403,274.34
5. Step 5: Solve for x
   x = 2,403,274.34/1,665.92
6. Step 6: Final answer
   x = 1,442.61