Finding the Third Proportional to 64,487.75 and 99,647.75

Step by Step Solution

1. Step 1: Write the proportion equation
   64,487.75 : 99,647.75 = 99,647.75 : x
2. Step 2: Convert to fraction form
   64,487.75/99,647.75 = 99,647.75/x
3. Step 3: Cross multiply
   64,487.75x = 99,647.75 × 99,647.75
4. Step 4: Simplify right side
   64,487.75x = 9,929,674,080.06
5. Step 5: Solve for x
   x = 9,929,674,080.06/64,487.75
6. Step 6: Final answer
   x = 153,977.68