Finding the Third Proportional to 66,624 and 99,619.50

Step by Step Solution

1. Step 1: Write the proportion equation
   66,624 : 99,619.50 = 99,619.50 : x
2. Step 2: Convert to fraction form
   66,624/99,619.50 = 99,619.50/x
3. Step 3: Cross multiply
   66,624x = 99,619.50 × 99,619.50
4. Step 4: Simplify right side
   66,624x = 9,924,044,780.25
5. Step 5: Solve for x
   x = 9,924,044,780.25/66,624
6. Step 6: Final answer
   x = 148,956.00