Finding the Third Proportional to 1,392.40 and 1,856.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,392.40 : 1,856.04 = 1,856.04 : x
2. Step 2: Convert to fraction form
   1,392.40/1,856.04 = 1,856.04/x
3. Step 3: Cross multiply
   1,392.40x = 1,856.04 × 1,856.04
4. Step 4: Simplify right side
   1,392.40x = 3,444,881.00
5. Step 5: Solve for x
   x = 3,444,881.00/1,392.40
6. Step 6: Final answer
   x = 2,474.06