Finding the Fourth Proportional to 1,665.99, 2,498.42 and 1,202.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.99 : 2,498.42 = 1,202.39 : x
2. Step 2: Convert to fraction form
   1,665.99/2,498.42 = 1,202.39/x
3. Step 3: Cross multiply
   1,665.99x = 2,498.42 × 1,202.39
4. Step 4: Simplify right side
   1,665.99x = 3,004,085.78
5. Step 5: Solve for x
   x = 3,004,085.78/1,665.99
6. Step 6: Final answer
   x = 1,803.18