Finding the Fourth Proportional to 2,223.51, 3,315.00 and 2,166.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,223.51 : 3,315.00 = 2,166.71 : x
2. Step 2: Convert to fraction form
   2,223.51/3,315.00 = 2,166.71/x
3. Step 3: Cross multiply
   2,223.51x = 3,315.00 × 2,166.71
4. Step 4: Simplify right side
   2,223.51x = 7,182,621.66
5. Step 5: Solve for x
   x = 7,182,621.66/2,223.51
6. Step 6: Final answer
   x = 3,230.31