Finding the Third Proportional to 47,687.91 and 72,145.69

Step by Step Solution

1. Step 1: Write the proportion equation
   47,687.91 : 72,145.69 = 72,145.69 : x
2. Step 2: Convert to fraction form
   47,687.91/72,145.69 = 72,145.69/x
3. Step 3: Cross multiply
   47,687.91x = 72,145.69 × 72,145.69
4. Step 4: Simplify right side
   47,687.91x = 5,205,000,224.85
5. Step 5: Solve for x
   x = 5,205,000,224.85/47,687.91
6. Step 6: Final answer
   x = 109,147.17