Finding the Third Proportional to 66,858.84 and 146,839.69

Step by Step Solution

1. Step 1: Write the proportion equation
   66,858.84 : 146,839.69 = 146,839.69 : x
2. Step 2: Convert to fraction form
   66,858.84/146,839.69 = 146,839.69/x
3. Step 3: Cross multiply
   66,858.84x = 146,839.69 × 146,839.69
4. Step 4: Simplify right side
   66,858.84x = 21,561,893,825.10
5. Step 5: Solve for x
   x = 21,561,893,825.10/66,858.84
6. Step 6: Final answer
   x = 322,498.75