Finding the Third Proportional to 303,315 and 660,139.50

Step by Step Solution

1. Step 1: Write the proportion equation
   303,315 : 660,139.50 = 660,139.50 : x
2. Step 2: Convert to fraction form
   303,315/660,139.50 = 660,139.50/x
3. Step 3: Cross multiply
   303,315x = 660,139.50 × 660,139.50
4. Step 4: Simplify right side
   303,315x = 435,784,159,460.25
5. Step 5: Solve for x
   x = 435,784,159,460.25/303,315
6. Step 6: Final answer
   x = 1,436,737.91