Finding the Fourth Proportional to 2,212.07, 3,315.00 and 1,663.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,212.07 : 3,315.00 = 1,663.61 : x
2. Step 2: Convert to fraction form
   2,212.07/3,315.00 = 1,663.61/x
3. Step 3: Cross multiply
   2,212.07x = 3,315.00 × 1,663.61
4. Step 4: Simplify right side
   2,212.07x = 5,514,856.81
5. Step 5: Solve for x
   x = 5,514,856.81/2,212.07
6. Step 6: Final answer
   x = 2,493.08