Finding the Third Proportional to 428,388 and 930,520.50

Step by Step Solution

1. Step 1: Write the proportion equation
   428,388 : 930,520.50 = 930,520.50 : x
2. Step 2: Convert to fraction form
   428,388/930,520.50 = 930,520.50/x
3. Step 3: Cross multiply
   428,388x = 930,520.50 × 930,520.50
4. Step 4: Simplify right side
   428,388x = 865,868,400,920.25
5. Step 5: Solve for x
   x = 865,868,400,920.25/428,388
6. Step 6: Final answer
   x = 2,021,224.69