Finding the Third Proportional to 367,311 and 538,390.50

Step by Step Solution

1. Step 1: Write the proportion equation
   367,311 : 538,390.50 = 538,390.50 : x
2. Step 2: Convert to fraction form
   367,311/538,390.50 = 538,390.50/x
3. Step 3: Cross multiply
   367,311x = 538,390.50 × 538,390.50
4. Step 4: Simplify right side
   367,311x = 289,864,330,490.25
5. Step 5: Solve for x
   x = 289,864,330,490.25/367,311
6. Step 6: Final answer
   x = 789,152.33