Finding the Third Proportional to 64,496.25 and 99,619.88

Step by Step Solution

1. Step 1: Write the proportion equation
   64,496.25 : 99,619.88 = 99,619.88 : x
2. Step 2: Convert to fraction form
   64,496.25/99,619.88 = 99,619.88/x
3. Step 3: Cross multiply
   64,496.25x = 99,619.88 × 99,619.88
4. Step 4: Simplify right side
   64,496.25x = 9,924,119,495.02
5. Step 5: Solve for x
   x = 9,924,119,495.02/64,496.25
6. Step 6: Final answer
   x = 153,871.26