Finding the Fourth Proportional to 1,665.06, 2,498.04 and 1,319.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.06 : 2,498.04 = 1,319.55 : x
2. Step 2: Convert to fraction form
   1,665.06/2,498.04 = 1,319.55/x
3. Step 3: Cross multiply
   1,665.06x = 2,498.04 × 1,319.55
4. Step 4: Simplify right side
   1,665.06x = 3,296,279.31
5. Step 5: Solve for x
   x = 3,296,279.31/1,665.06
6. Step 6: Final answer
   x = 1,979.68