Finding the Third Proportional to 12,742.31 and 18,543.94

Step by Step Solution

1. Step 1: Write the proportion equation
   12,742.31 : 18,543.94 = 18,543.94 : x
2. Step 2: Convert to fraction form
   12,742.31/18,543.94 = 18,543.94/x
3. Step 3: Cross multiply
   12,742.31x = 18,543.94 × 18,543.94
4. Step 4: Simplify right side
   12,742.31x = 343,877,618.00
5. Step 5: Solve for x
   x = 343,877,618.00/12,742.31
6. Step 6: Final answer
   x = 26,987.07