Finding the Fourth Proportional to 1,665.38, 2,498.52 and 554.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.38 : 2,498.52 = 554.78 : x
2. Step 2: Convert to fraction form
   1,665.38/2,498.52 = 554.78/x
3. Step 3: Cross multiply
   1,665.38x = 2,498.52 × 554.78
4. Step 4: Simplify right side
   1,665.38x = 1,386,128.93
5. Step 5: Solve for x
   x = 1,386,128.93/1,665.38
6. Step 6: Final answer
   x = 832.32