Finding the Third Proportional to 7,718.63 and 12,337.31

Step by Step Solution

1. Step 1: Write the proportion equation
   7,718.63 : 12,337.31 = 12,337.31 : x
2. Step 2: Convert to fraction form
   7,718.63/12,337.31 = 12,337.31/x
3. Step 3: Cross multiply
   7,718.63x = 12,337.31 × 12,337.31
4. Step 4: Simplify right side
   7,718.63x = 152,209,279.72
5. Step 5: Solve for x
   x = 152,209,279.72/7,718.63
6. Step 6: Final answer
   x = 19,719.74