Finding the Third Proportional to 70,659 and 99,028.50

Step by Step Solution

1. Step 1: Write the proportion equation
   70,659 : 99,028.50 = 99,028.50 : x
2. Step 2: Convert to fraction form
   70,659/99,028.50 = 99,028.50/x
3. Step 3: Cross multiply
   70,659x = 99,028.50 × 99,028.50
4. Step 4: Simplify right side
   70,659x = 9,806,643,812.25
5. Step 5: Solve for x
   x = 9,806,643,812.25/70,659
6. Step 6: Final answer
   x = 138,788.32