Finding the Third Proportional to 66,018.38 and 99,343.69

Step by Step Solution

1. Step 1: Write the proportion equation
   66,018.38 : 99,343.69 = 99,343.69 : x
2. Step 2: Convert to fraction form
   66,018.38/99,343.69 = 99,343.69/x
3. Step 3: Cross multiply
   66,018.38x = 99,343.69 × 99,343.69
4. Step 4: Simplify right side
   66,018.38x = 9,869,168,246.10
5. Step 5: Solve for x
   x = 9,869,168,246.10/66,018.38
6. Step 6: Final answer
   x = 149,491.23