Finding the Third Proportional to 616,900.50 and 920,211

Step by Step Solution

1. Step 1: Write the proportion equation
   616,900.50 : 920,211 = 920,211 : x
2. Step 2: Convert to fraction form
   616,900.50/920,211 = 920,211/x
3. Step 3: Cross multiply
   616,900.50x = 920,211 × 920,211
4. Step 4: Simplify right side
   616,900.50x = 846,788,284,521
5. Step 5: Solve for x
   x = 846,788,284,521/616,900.50
6. Step 6: Final answer
   x = 1,372,649.70