Finding the Third Proportional to 538,440 and 833,620.50

Step by Step Solution

1. Step 1: Write the proportion equation
   538,440 : 833,620.50 = 833,620.50 : x
2. Step 2: Convert to fraction form
   538,440/833,620.50 = 833,620.50/x
3. Step 3: Cross multiply
   538,440x = 833,620.50 × 833,620.50
4. Step 4: Simplify right side
   538,440x = 694,923,138,020.25
5. Step 5: Solve for x
   x = 694,923,138,020.25/538,440
6. Step 6: Final answer
   x = 1,290,623.17