Finding the Third Proportional to 1,392.19 and 1,857.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,392.19 : 1,857.94 = 1,857.94 : x
2. Step 2: Convert to fraction form
   1,392.19/1,857.94 = 1,857.94/x
3. Step 3: Cross multiply
   1,392.19x = 1,857.94 × 1,857.94
4. Step 4: Simplify right side
   1,392.19x = 3,451,931.75
5. Step 5: Solve for x
   x = 3,451,931.75/1,392.19
6. Step 6: Final answer
   x = 2,479.50