Finding the Third Proportional to 51,273.28 and 78,705.42

Step by Step Solution

1. Step 1: Write the proportion equation
   51,273.28 : 78,705.42 = 78,705.42 : x
2. Step 2: Convert to fraction form
   51,273.28/78,705.42 = 78,705.42/x
3. Step 3: Cross multiply
   51,273.28x = 78,705.42 × 78,705.42
4. Step 4: Simplify right side
   51,273.28x = 6,194,543,432.52
5. Step 5: Solve for x
   x = 6,194,543,432.52/51,273.28
6. Step 6: Final answer
   x = 120,814.26