Finding the Fourth Proportional to 2,221.56, 3,332.61 and 1,066.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,221.56 : 3,332.61 = 1,066.50 : x
2. Step 2: Convert to fraction form
   2,221.56/3,332.61 = 1,066.50/x
3. Step 3: Cross multiply
   2,221.56x = 3,332.61 × 1,066.50
4. Step 4: Simplify right side
   2,221.56x = 3,554,228.57
5. Step 5: Solve for x
   x = 3,554,228.57/2,221.56
6. Step 6: Final answer
   x = 1,599.88