Finding the Third Proportional to 178,475.50 and 389,507

Step by Step Solution

1. Step 1: Write the proportion equation
   178,475.50 : 389,507 = 389,507 : x
2. Step 2: Convert to fraction form
   178,475.50/389,507 = 389,507/x
3. Step 3: Cross multiply
   178,475.50x = 389,507 × 389,507
4. Step 4: Simplify right side
   178,475.50x = 151,715,703,049
5. Step 5: Solve for x
   x = 151,715,703,049/178,475.50
6. Step 6: Final answer
   x = 850,064.59