Finding the Third Proportional to 179,308 and 390,156

Step by Step Solution

1. Step 1: Write the proportion equation
   179,308 : 390,156 = 390,156 : x
2. Step 2: Convert to fraction form
   179,308/390,156 = 390,156/x
3. Step 3: Cross multiply
   179,308x = 390,156 × 390,156
4. Step 4: Simplify right side
   179,308x = 152,221,704,336
5. Step 5: Solve for x
   x = 152,221,704,336/179,308
6. Step 6: Final answer
   x = 848,939.84