Finding the Third Proportional to 12,810 and 29,389.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,810 : 29,389.50 = 29,389.50 : x
2. Step 2: Convert to fraction form
   12,810/29,389.50 = 29,389.50/x
3. Step 3: Cross multiply
   12,810x = 29,389.50 × 29,389.50
4. Step 4: Simplify right side
   12,810x = 863,742,710.25
5. Step 5: Solve for x
   x = 863,742,710.25/12,810
6. Step 6: Final answer
   x = 67,427.22