Finding the Fourth Proportional to 3,978.52, 5,490.12 and 2,210.02

Step by Step Solution

1. Step 1: Write the proportion equation
   3,978.52 : 5,490.12 = 2,210.02 : x
2. Step 2: Convert to fraction form
   3,978.52/5,490.12 = 2,210.02/x
3. Step 3: Cross multiply
   3,978.52x = 5,490.12 × 2,210.02
4. Step 4: Simplify right side
   3,978.52x = 12,133,275.00
5. Step 5: Solve for x
   x = 12,133,275.00/3,978.52
6. Step 6: Final answer
   x = 3,049.70