Finding the Third Proportional to 178,308 and 388,602

Step by Step Solution

1. Step 1: Write the proportion equation
   178,308 : 388,602 = 388,602 : x
2. Step 2: Convert to fraction form
   178,308/388,602 = 388,602/x
3. Step 3: Cross multiply
   178,308x = 388,602 × 388,602
4. Step 4: Simplify right side
   178,308x = 151,011,514,404
5. Step 5: Solve for x
   x = 151,011,514,404/178,308
6. Step 6: Final answer
   x = 846,913.85