Finding the Fourth Proportional to 2,212.72, 3,317.47 and 1,117.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,212.72 : 3,317.47 = 1,117.86 : x
2. Step 2: Convert to fraction form
   2,212.72/3,317.47 = 1,117.86/x
3. Step 3: Cross multiply
   2,212.72x = 3,317.47 × 1,117.86
4. Step 4: Simplify right side
   2,212.72x = 3,708,461.42
5. Step 5: Solve for x
   x = 3,708,461.42/2,212.72
6. Step 6: Final answer
   x = 1,675.97