Finding the Third Proportional to 45,709 and 72,991

Step by Step Solution

1. Step 1: Write the proportion equation
   45,709 : 72,991 = 72,991 : x
2. Step 2: Convert to fraction form
   45,709/72,991 = 72,991/x
3. Step 3: Cross multiply
   45,709x = 72,991 × 72,991
4. Step 4: Simplify right side
   45,709x = 5,327,686,081
5. Step 5: Solve for x
   x = 5,327,686,081/45,709
6. Step 6: Final answer
   x = 116,556.61