Finding the Third Proportional to 1,928.81 and 2,920.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,928.81 : 2,920.31 = 2,920.31 : x
2. Step 2: Convert to fraction form
   1,928.81/2,920.31 = 2,920.31/x
3. Step 3: Cross multiply
   1,928.81x = 2,920.31 × 2,920.31
4. Step 4: Simplify right side
   1,928.81x = 8,528,225.10
5. Step 5: Solve for x
   x = 8,528,225.10/1,928.81
6. Step 6: Final answer
   x = 4,421.49