Finding the Third Proportional to 47,728.13 and 81,501.19

Step by Step Solution

1. Step 1: Write the proportion equation
   47,728.13 : 81,501.19 = 81,501.19 : x
2. Step 2: Convert to fraction form
   47,728.13/81,501.19 = 81,501.19/x
3. Step 3: Cross multiply
   47,728.13x = 81,501.19 × 81,501.19
4. Step 4: Simplify right side
   47,728.13x = 6,642,443,563.91
5. Step 5: Solve for x
   x = 6,642,443,563.91/47,728.13
6. Step 6: Final answer
   x = 139,172.52