Finding the Fourth Proportional to 2,169.35, 2,992.90 and 1,423.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,169.35 : 2,992.90 = 1,423.72 : x
2. Step 2: Convert to fraction form
   2,169.35/2,992.90 = 1,423.72/x
3. Step 3: Cross multiply
   2,169.35x = 2,992.90 × 1,423.72
4. Step 4: Simplify right side
   2,169.35x = 4,261,051.59
5. Step 5: Solve for x
   x = 4,261,051.59/2,169.35
6. Step 6: Final answer
   x = 1,964.21