Finding the Third Proportional to 156,726 and 329,580

Step by Step Solution

1. Step 1: Write the proportion equation
   156,726 : 329,580 = 329,580 : x
2. Step 2: Convert to fraction form
   156,726/329,580 = 329,580/x
3. Step 3: Cross multiply
   156,726x = 329,580 × 329,580
4. Step 4: Simplify right side
   156,726x = 108,622,976,400
5. Step 5: Solve for x
   x = 108,622,976,400/156,726
6. Step 6: Final answer
   x = 693,075.66