Finding the Third Proportional to 69,313.50 and 99,121.50

Step by Step Solution

1. Step 1: Write the proportion equation
   69,313.50 : 99,121.50 = 99,121.50 : x
2. Step 2: Convert to fraction form
   69,313.50/99,121.50 = 99,121.50/x
3. Step 3: Cross multiply
   69,313.50x = 99,121.50 × 99,121.50
4. Step 4: Simplify right side
   69,313.50x = 9,825,071,762.25
5. Step 5: Solve for x
   x = 9,825,071,762.25/69,313.50
6. Step 6: Final answer
   x = 141,748.31