Finding the Third Proportional to 80,045.72 and 168,907.78

Step by Step Solution

1. Step 1: Write the proportion equation
   80,045.72 : 168,907.78 = 168,907.78 : x
2. Step 2: Convert to fraction form
   80,045.72/168,907.78 = 168,907.78/x
3. Step 3: Cross multiply
   80,045.72x = 168,907.78 × 168,907.78
4. Step 4: Simplify right side
   80,045.72x = 28,529,838,566.80
5. Step 5: Solve for x
   x = 28,529,838,566.80/80,045.72
6. Step 6: Final answer
   x = 356,419.29