Finding the Third Proportional to 328,113 and 469,200

Step by Step Solution

1. Step 1: Write the proportion equation
   328,113 : 469,200 = 469,200 : x
2. Step 2: Convert to fraction form
   328,113/469,200 = 469,200/x
3. Step 3: Cross multiply
   328,113x = 469,200 × 469,200
4. Step 4: Simplify right side
   328,113x = 220,148,640,000
5. Step 5: Solve for x
   x = 220,148,640,000/328,113
6. Step 6: Final answer
   x = 670,953.73