Finding the Fourth Proportional to 2,530.47, 3,491.01 and 1,680.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,530.47 : 3,491.01 = 1,680.12 : x
2. Step 2: Convert to fraction form
   2,530.47/3,491.01 = 1,680.12/x
3. Step 3: Cross multiply
   2,530.47x = 3,491.01 × 1,680.12
4. Step 4: Simplify right side
   2,530.47x = 5,865,315.72
5. Step 5: Solve for x
   x = 5,865,315.72/2,530.47
6. Step 6: Final answer
   x = 2,317.88