Finding the Third Proportional to 52,920.50 and 72,900.75

Step by Step Solution

1. Step 1: Write the proportion equation
   52,920.50 : 72,900.75 = 72,900.75 : x
2. Step 2: Convert to fraction form
   52,920.50/72,900.75 = 72,900.75/x
3. Step 3: Cross multiply
   52,920.50x = 72,900.75 × 72,900.75
4. Step 4: Simplify right side
   52,920.50x = 5,314,519,350.56
5. Step 5: Solve for x
   x = 5,314,519,350.56/52,920.50
6. Step 6: Final answer
   x = 100,424.59