Finding the Third Proportional to 64,389.94 and 99,619.03

Step by Step Solution

1. Step 1: Write the proportion equation
   64,389.94 : 99,619.03 = 99,619.03 : x
2. Step 2: Convert to fraction form
   64,389.94/99,619.03 = 99,619.03/x
3. Step 3: Cross multiply
   64,389.94x = 99,619.03 × 99,619.03
4. Step 4: Simplify right side
   64,389.94x = 9,923,951,387.19
5. Step 5: Solve for x
   x = 9,923,951,387.19/64,389.94
6. Step 6: Final answer
   x = 154,122.71