Finding the Fourth Proportional to 2,223.56, 3,333.18 and 1,978.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,223.56 : 3,333.18 = 1,978.76 : x
2. Step 2: Convert to fraction form
   2,223.56/3,333.18 = 1,978.76/x
3. Step 3: Cross multiply
   2,223.56x = 3,333.18 × 1,978.76
4. Step 4: Simplify right side
   2,223.56x = 6,595,563.26
5. Step 5: Solve for x
   x = 6,595,563.26/2,223.56
6. Step 6: Final answer
   x = 2,966.22