Finding the Third Proportional to 288,680 and 448,082.50

Step by Step Solution

1. Step 1: Write the proportion equation
   288,680 : 448,082.50 = 448,082.50 : x
2. Step 2: Convert to fraction form
   288,680/448,082.50 = 448,082.50/x
3. Step 3: Cross multiply
   288,680x = 448,082.50 × 448,082.50
4. Step 4: Simplify right side
   288,680x = 200,777,926,806.25
5. Step 5: Solve for x
   x = 200,777,926,806.25/288,680
6. Step 6: Final answer
   x = 695,503.42