Finding the Third Proportional to 51,870.50 and 80,108.75

Step by Step Solution

1. Step 1: Write the proportion equation
   51,870.50 : 80,108.75 = 80,108.75 : x
2. Step 2: Convert to fraction form
   51,870.50/80,108.75 = 80,108.75/x
3. Step 3: Cross multiply
   51,870.50x = 80,108.75 × 80,108.75
4. Step 4: Simplify right side
   51,870.50x = 6,417,411,826.56
5. Step 5: Solve for x
   x = 6,417,411,826.56/51,870.50
6. Step 6: Final answer
   x = 123,719.88