Finding the Third Proportional to 303,321 and 715,777.50

Step by Step Solution

1. Step 1: Write the proportion equation
   303,321 : 715,777.50 = 715,777.50 : x
2. Step 2: Convert to fraction form
   303,321/715,777.50 = 715,777.50/x
3. Step 3: Cross multiply
   303,321x = 715,777.50 × 715,777.50
4. Step 4: Simplify right side
   303,321x = 512,337,429,506.25
5. Step 5: Solve for x
   x = 512,337,429,506.25/303,321
6. Step 6: Final answer
   x = 1,689,093.17