Finding the Fourth Proportional to 2,228.86, 3,319.76 and 2,111.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,228.86 : 3,319.76 = 2,111.78 : x
2. Step 2: Convert to fraction form
   2,228.86/3,319.76 = 2,111.78/x
3. Step 3: Cross multiply
   2,228.86x = 3,319.76 × 2,111.78
4. Step 4: Simplify right side
   2,228.86x = 7,010,602.77
5. Step 5: Solve for x
   x = 7,010,602.77/2,228.86
6. Step 6: Final answer
   x = 3,145.38