Finding the Fourth Proportional to 1,788.72, 2,682.18 and 693.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,788.72 : 2,682.18 = 693.40 : x
2. Step 2: Convert to fraction form
   1,788.72/2,682.18 = 693.40/x
3. Step 3: Cross multiply
   1,788.72x = 2,682.18 × 693.40
4. Step 4: Simplify right side
   1,788.72x = 1,859,823.61
5. Step 5: Solve for x
   x = 1,859,823.61/1,788.72
6. Step 6: Final answer
   x = 1,039.75