Finding the Third Proportional to 2,790.19 and 5,867.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,790.19 : 5,867.63 = 5,867.63 : x
2. Step 2: Convert to fraction form
   2,790.19/5,867.63 = 5,867.63/x
3. Step 3: Cross multiply
   2,790.19x = 5,867.63 × 5,867.63
4. Step 4: Simplify right side
   2,790.19x = 34,429,023.14
5. Step 5: Solve for x
   x = 34,429,023.14/2,790.19
6. Step 6: Final answer
   x = 12,339.32