Finding the Third Proportional to 70,645.50 and 99,009.50

Step by Step Solution

1. Step 1: Write the proportion equation
   70,645.50 : 99,009.50 = 99,009.50 : x
2. Step 2: Convert to fraction form
   70,645.50/99,009.50 = 99,009.50/x
3. Step 3: Cross multiply
   70,645.50x = 99,009.50 × 99,009.50
4. Step 4: Simplify right side
   70,645.50x = 9,802,881,090.25
5. Step 5: Solve for x
   x = 9,802,881,090.25/70,645.50
6. Step 6: Final answer
   x = 138,761.58