Finding the Fourth Proportional to 2,221.56, 3,047.90 and 2,164.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,221.56 : 3,047.90 = 2,164.05 : x
2. Step 2: Convert to fraction form
   2,221.56/3,047.90 = 2,164.05/x
3. Step 3: Cross multiply
   2,221.56x = 3,047.90 × 2,164.05
4. Step 4: Simplify right side
   2,221.56x = 6,595,797.17
5. Step 5: Solve for x
   x = 6,595,797.17/2,221.56
6. Step 6: Final answer
   x = 2,968.99