Finding the Fourth Proportional to 1,680.50, 2,522.01 and 1,211.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,680.50 : 2,522.01 = 1,211.73 : x
2. Step 2: Convert to fraction form
   1,680.50/2,522.01 = 1,211.73/x
3. Step 3: Cross multiply
   1,680.50x = 2,522.01 × 1,211.73
4. Step 4: Simplify right side
   1,680.50x = 3,055,995.18
5. Step 5: Solve for x
   x = 3,055,995.18/1,680.50
6. Step 6: Final answer
   x = 1,818.50