Finding the Fourth Proportional to 1,680.55, 2,522.53 and 693.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,680.55 : 2,522.53 = 693.96 : x
2. Step 2: Convert to fraction form
   1,680.55/2,522.53 = 693.96/x
3. Step 3: Cross multiply
   1,680.55x = 2,522.53 × 693.96
4. Step 4: Simplify right side
   1,680.55x = 1,750,522.31
5. Step 5: Solve for x
   x = 1,750,522.31/1,680.55
6. Step 6: Final answer
   x = 1,041.64