Finding the Fourth Proportional to 1,873.12, 2,580.72 and 1,698.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,873.12 : 2,580.72 = 1,698.40 : x
2. Step 2: Convert to fraction form
   1,873.12/2,580.72 = 1,698.40/x
3. Step 3: Cross multiply
   1,873.12x = 2,580.72 × 1,698.40
4. Step 4: Simplify right side
   1,873.12x = 4,383,094.85
5. Step 5: Solve for x
   x = 4,383,094.85/1,873.12
6. Step 6: Final answer
   x = 2,340.00