Finding the Fourth Proportional to 1,680.73, 2,520.63 and 1,404.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,680.73 : 2,520.63 = 1,404.84 : x
2. Step 2: Convert to fraction form
   1,680.73/2,520.63 = 1,404.84/x
3. Step 3: Cross multiply
   1,680.73x = 2,520.63 × 1,404.84
4. Step 4: Simplify right side
   1,680.73x = 3,541,081.85
5. Step 5: Solve for x
   x = 3,541,081.85/1,680.73
6. Step 6: Final answer
   x = 2,106.87