Finding the Third Proportional to 156,298 and 336,320

Step by Step Solution

1. Step 1: Write the proportion equation
   156,298 : 336,320 = 336,320 : x
2. Step 2: Convert to fraction form
   156,298/336,320 = 336,320/x
3. Step 3: Cross multiply
   156,298x = 336,320 × 336,320
4. Step 4: Simplify right side
   156,298x = 113,111,142,400
5. Step 5: Solve for x
   x = 113,111,142,400/156,298
6. Step 6: Final answer
   x = 723,688.99