Finding the Third Proportional to 66,513.75 and 99,767.63

Step by Step Solution

1. Step 1: Write the proportion equation
   66,513.75 : 99,767.63 = 99,767.63 : x
2. Step 2: Convert to fraction form
   66,513.75/99,767.63 = 99,767.63/x
3. Step 3: Cross multiply
   66,513.75x = 99,767.63 × 99,767.63
4. Step 4: Simplify right side
   66,513.75x = 9,953,578,998.14
5. Step 5: Solve for x
   x = 9,953,578,998.14/66,513.75
6. Step 6: Final answer
   x = 149,646.94