Finding the Third Proportional to 51,662.81 and 78,976.13

Step by Step Solution

1. Step 1: Write the proportion equation
   51,662.81 : 78,976.13 = 78,976.13 : x
2. Step 2: Convert to fraction form
   51,662.81/78,976.13 = 78,976.13/x
3. Step 3: Cross multiply
   51,662.81x = 78,976.13 × 78,976.13
4. Step 4: Simplify right side
   51,662.81x = 6,237,228,320.02
5. Step 5: Solve for x
   x = 6,237,228,320.02/51,662.81
6. Step 6: Final answer
   x = 120,729.55