Finding the Third Proportional to 72,628.50 and 99,015.75

Step by Step Solution

1. Step 1: Write the proportion equation
   72,628.50 : 99,015.75 = 99,015.75 : x
2. Step 2: Convert to fraction form
   72,628.50/99,015.75 = 99,015.75/x
3. Step 3: Cross multiply
   72,628.50x = 99,015.75 × 99,015.75
4. Step 4: Simplify right side
   72,628.50x = 9,804,118,748.06
5. Step 5: Solve for x
   x = 9,804,118,748.06/72,628.50
6. Step 6: Final answer
   x = 134,989.97