Finding the Fourth Proportional to 2,216.01, 3,317.00 and 1,239.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,216.01 : 3,317.00 = 1,239.15 : x
2. Step 2: Convert to fraction form
   2,216.01/3,317.00 = 1,239.15/x
3. Step 3: Cross multiply
   2,216.01x = 3,317.00 × 1,239.15
4. Step 4: Simplify right side
   2,216.01x = 4,110,254.35
5. Step 5: Solve for x
   x = 4,110,254.35/2,216.01
6. Step 6: Final answer
   x = 1,854.80