Finding the Fourth Proportional to 2,221.65, 3,329.46 and 1,051.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,221.65 : 3,329.46 = 1,051.47 : x
2. Step 2: Convert to fraction form
   2,221.65/3,329.46 = 1,051.47/x
3. Step 3: Cross multiply
   2,221.65x = 3,329.46 × 1,051.47
4. Step 4: Simplify right side
   2,221.65x = 3,500,827.31
5. Step 5: Solve for x
   x = 3,500,827.31/2,221.65
6. Step 6: Final answer
   x = 1,575.78