Finding the Third Proportional to 80,320.78 and 174,490.03

Step by Step Solution

1. Step 1: Write the proportion equation
   80,320.78 : 174,490.03 = 174,490.03 : x
2. Step 2: Convert to fraction form
   80,320.78/174,490.03 = 174,490.03/x
3. Step 3: Cross multiply
   80,320.78x = 174,490.03 × 174,490.03
4. Step 4: Simplify right side
   80,320.78x = 30,446,771,005.63
5. Step 5: Solve for x
   x = 30,446,771,005.63/80,320.78
6. Step 6: Final answer
   x = 379,064.68