Finding the Fourth Proportional to 3,978.84, 5,491.02 and 2,210.46

Step by Step Solution

1. Step 1: Write the proportion equation
   3,978.84 : 5,491.02 = 2,210.46 : x
2. Step 2: Convert to fraction form
   3,978.84/5,491.02 = 2,210.46/x
3. Step 3: Cross multiply
   3,978.84x = 5,491.02 × 2,210.46
4. Step 4: Simplify right side
   3,978.84x = 12,137,680.07
5. Step 5: Solve for x
   x = 12,137,680.07/3,978.84
6. Step 6: Final answer
   x = 3,050.56