Finding the Third Proportional to 50,487.50 and 78,398.75

Step by Step Solution

1. Step 1: Write the proportion equation
   50,487.50 : 78,398.75 = 78,398.75 : x
2. Step 2: Convert to fraction form
   50,487.50/78,398.75 = 78,398.75/x
3. Step 3: Cross multiply
   50,487.50x = 78,398.75 × 78,398.75
4. Step 4: Simplify right side
   50,487.50x = 6,146,364,001.56
5. Step 5: Solve for x
   x = 6,146,364,001.56/50,487.50
6. Step 6: Final answer
   x = 121,740.31