Finding the Third Proportional to 156,980 and 336,100

Step by Step Solution

1. Step 1: Write the proportion equation
   156,980 : 336,100 = 336,100 : x
2. Step 2: Convert to fraction form
   156,980/336,100 = 336,100/x
3. Step 3: Cross multiply
   156,980x = 336,100 × 336,100
4. Step 4: Simplify right side
   156,980x = 112,963,210,000
5. Step 5: Solve for x
   x = 112,963,210,000/156,980
6. Step 6: Final answer
   x = 719,602.56