Finding the Fourth Proportional to 3,900.52, 5,382.72 and 2,221.99

Step by Step Solution

1. Step 1: Write the proportion equation
   3,900.52 : 5,382.72 = 2,221.99 : x
2. Step 2: Convert to fraction form
   3,900.52/5,382.72 = 2,221.99/x
3. Step 3: Cross multiply
   3,900.52x = 5,382.72 × 2,221.99
4. Step 4: Simplify right side
   3,900.52x = 11,960,366.83
5. Step 5: Solve for x
   x = 11,960,366.83/3,900.52
6. Step 6: Final answer
   x = 3,066.36