Finding the Fourth Proportional to 2,923.74, 4,387.83 and 2,145.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,923.74 : 4,387.83 = 2,145.72 : x
2. Step 2: Convert to fraction form
   2,923.74/4,387.83 = 2,145.72/x
3. Step 3: Cross multiply
   2,923.74x = 4,387.83 × 2,145.72
4. Step 4: Simplify right side
   2,923.74x = 9,415,054.59
5. Step 5: Solve for x
   x = 9,415,054.59/2,923.74
6. Step 6: Final answer
   x = 3,220.21