Finding the Fourth Proportional to 2,108,619.20, 3,163,122.96 and 688,682.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,108,619.20 : 3,163,122.96 = 688,682.72 : x
2. Step 2: Convert to fraction form
   2,108,619.20/3,163,122.96 = 688,682.72/x
3. Step 3: Cross multiply
   2,108,619.20x = 3,163,122.96 × 688,682.72
4. Step 4: Simplify right side
   2,108,619.20x = 2,178,388,123,787.25
5. Step 5: Solve for x
   x = 2,178,388,123,787.25/2,108,619.20
6. Step 6: Final answer
   x = 1,033,087.49