Finding the Fourth Proportional to 1,498.80, 2,259.42 and 1,398.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,498.80 : 2,259.42 = 1,398.47 : x
2. Step 2: Convert to fraction form
   1,498.80/2,259.42 = 1,398.47/x
3. Step 3: Cross multiply
   1,498.80x = 2,259.42 × 1,398.47
4. Step 4: Simplify right side
   1,498.80x = 3,159,719.79
5. Step 5: Solve for x
   x = 3,159,719.79/1,498.80
6. Step 6: Final answer
   x = 2,108.17