Finding the Third Proportional to 1,421.72 and 2,154.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,421.72 : 2,154.52 = 2,154.52 : x
2. Step 2: Convert to fraction form
   1,421.72/2,154.52 = 2,154.52/x
3. Step 3: Cross multiply
   1,421.72x = 2,154.52 × 2,154.52
4. Step 4: Simplify right side
   1,421.72x = 4,641,937.58
5. Step 5: Solve for x
   x = 4,641,937.58/1,421.72
6. Step 6: Final answer
   x = 3,265.02