Finding the Third Proportional to 538,431 and 833,608.50

Step by Step Solution

1. Step 1: Write the proportion equation
   538,431 : 833,608.50 = 833,608.50 : x
2. Step 2: Convert to fraction form
   538,431/833,608.50 = 833,608.50/x
3. Step 3: Cross multiply
   538,431x = 833,608.50 × 833,608.50
4. Step 4: Simplify right side
   538,431x = 694,903,131,272.25
5. Step 5: Solve for x
   x = 694,903,131,272.25/538,431
6. Step 6: Final answer
   x = 1,290,607.58