Finding the Third Proportional to 47,292.75 and 78,821.38

Step by Step Solution

1. Step 1: Write the proportion equation
   47,292.75 : 78,821.38 = 78,821.38 : x
2. Step 2: Convert to fraction form
   47,292.75/78,821.38 = 78,821.38/x
3. Step 3: Cross multiply
   47,292.75x = 78,821.38 × 78,821.38
4. Step 4: Simplify right side
   47,292.75x = 6,212,809,156.89
5. Step 5: Solve for x
   x = 6,212,809,156.89/47,292.75
6. Step 6: Final answer
   x = 131,369.17