Finding the Third Proportional to 12,890,896.50 and 18,642,478.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,890,896.50 : 18,642,478.50 = 18,642,478.50 : x
2. Step 2: Convert to fraction form
   12,890,896.50/18,642,478.50 = 18,642,478.50/x
3. Step 3: Cross multiply
   12,890,896.50x = 18,642,478.50 × 18,642,478.50
4. Step 4: Simplify right side
   12,890,896.50x = 347,542,004,622,962.25
5. Step 5: Solve for x
   x = 347,542,004,622,962.25/12,890,896.50
6. Step 6: Final answer
   x = 26,960,266.47