Finding the Fourth Proportional to 1,809.34, 2,498.01 and 1,388.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,809.34 : 2,498.01 = 1,388.89 : x
2. Step 2: Convert to fraction form
   1,809.34/2,498.01 = 1,388.89/x
3. Step 3: Cross multiply
   1,809.34x = 2,498.01 × 1,388.89
4. Step 4: Simplify right side
   1,809.34x = 3,469,454.86
5. Step 5: Solve for x
   x = 3,469,454.86/1,809.34
6. Step 6: Final answer
   x = 1,917.53