Finding the Third Proportional to 12,899.63 and 26,345.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,899.63 : 26,345.88 = 26,345.88 : x
2. Step 2: Convert to fraction form
   12,899.63/26,345.88 = 26,345.88/x
3. Step 3: Cross multiply
   12,899.63x = 26,345.88 × 26,345.88
4. Step 4: Simplify right side
   12,899.63x = 694,105,129.52
5. Step 5: Solve for x
   x = 694,105,129.52/12,899.63
6. Step 6: Final answer
   x = 53,808.16