Finding the Fourth Proportional to 2,234.16, 3,086.96 and 2,155.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,234.16 : 3,086.96 = 2,155.32 : x
2. Step 2: Convert to fraction form
   2,234.16/3,086.96 = 2,155.32/x
3. Step 3: Cross multiply
   2,234.16x = 3,086.96 × 2,155.32
4. Step 4: Simplify right side
   2,234.16x = 6,653,386.63
5. Step 5: Solve for x
   x = 6,653,386.63/2,234.16
6. Step 6: Final answer
   x = 2,978.03