Finding the Third Proportional to 156,388 and 334,920

Step by Step Solution

1. Step 1: Write the proportion equation
   156,388 : 334,920 = 334,920 : x
2. Step 2: Convert to fraction form
   156,388/334,920 = 334,920/x
3. Step 3: Cross multiply
   156,388x = 334,920 × 334,920
4. Step 4: Simplify right side
   156,388x = 112,171,406,400
5. Step 5: Solve for x
   x = 112,171,406,400/156,388
6. Step 6: Final answer
   x = 717,263.51