Finding the Third Proportional to 156,648 and 331,156

Step by Step Solution

1. Step 1: Write the proportion equation
   156,648 : 331,156 = 331,156 : x
2. Step 2: Convert to fraction form
   156,648/331,156 = 331,156/x
3. Step 3: Cross multiply
   156,648x = 331,156 × 331,156
4. Step 4: Simplify right side
   156,648x = 109,664,296,336
5. Step 5: Solve for x
   x = 109,664,296,336/156,648
6. Step 6: Final answer
   x = 700,068.28