Finding the Fourth Proportional to 2,001.55, 3,005.70 and 1,672.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,001.55 : 3,005.70 = 1,672.15 : x
2. Step 2: Convert to fraction form
   2,001.55/3,005.70 = 1,672.15/x
3. Step 3: Cross multiply
   2,001.55x = 3,005.70 × 1,672.15
4. Step 4: Simplify right side
   2,001.55x = 5,025,981.26
5. Step 5: Solve for x
   x = 5,025,981.26/2,001.55
6. Step 6: Final answer
   x = 2,511.04