Finding the Fourth Proportional to 687,196.54, 1,025,215 and 649,995.67

Step by Step Solution

1. Step 1: Write the proportion equation
   687,196.54 : 1,025,215 = 649,995.67 : x
2. Step 2: Convert to fraction form
   687,196.54/1,025,215 = 649,995.67/x
3. Step 3: Cross multiply
   687,196.54x = 1,025,215 × 649,995.67
4. Step 4: Simplify right side
   687,196.54x = 666,385,310,819.05
5. Step 5: Solve for x
   x = 666,385,310,819.05/687,196.54
6. Step 6: Final answer
   x = 969,715.75