Finding the Third Proportional to 66,518.72 and 147,799.69

Step by Step Solution

1. Step 1: Write the proportion equation
   66,518.72 : 147,799.69 = 147,799.69 : x
2. Step 2: Convert to fraction form
   66,518.72/147,799.69 = 147,799.69/x
3. Step 3: Cross multiply
   66,518.72x = 147,799.69 × 147,799.69
4. Step 4: Simplify right side
   66,518.72x = 21,844,747,625.10
5. Step 5: Solve for x
   x = 21,844,747,625.10/66,518.72
6. Step 6: Final answer
   x = 328,400.01