Finding the Third Proportional to 276,390 and 599,431.50

Step by Step Solution

1. Step 1: Write the proportion equation
   276,390 : 599,431.50 = 599,431.50 : x
2. Step 2: Convert to fraction form
   276,390/599,431.50 = 599,431.50/x
3. Step 3: Cross multiply
   276,390x = 599,431.50 × 599,431.50
4. Step 4: Simplify right side
   276,390x = 359,318,123,192.25
5. Step 5: Solve for x
   x = 359,318,123,192.25/276,390
6. Step 6: Final answer
   x = 1,300,040.24