Finding the Third Proportional to 478,212 and 668,649.50

Step by Step Solution

1. Step 1: Write the proportion equation
   478,212 : 668,649.50 = 668,649.50 : x
2. Step 2: Convert to fraction form
   478,212/668,649.50 = 668,649.50/x
3. Step 3: Cross multiply
   478,212x = 668,649.50 × 668,649.50
4. Step 4: Simplify right side
   478,212x = 447,092,153,850.25
5. Step 5: Solve for x
   x = 447,092,153,850.25/478,212
6. Step 6: Final answer
   x = 934,924.58