Finding the Third Proportional to 177,931.50 and 388,695

Step by Step Solution

1. Step 1: Write the proportion equation
   177,931.50 : 388,695 = 388,695 : x
2. Step 2: Convert to fraction form
   177,931.50/388,695 = 388,695/x
3. Step 3: Cross multiply
   177,931.50x = 388,695 × 388,695
4. Step 4: Simplify right side
   177,931.50x = 151,083,803,025
5. Step 5: Solve for x
   x = 151,083,803,025/177,931.50
6. Step 6: Final answer
   x = 849,112.18