Finding the Fourth Proportional to 2,116,738.28, 3,175,116.06 and 519,311.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,116,738.28 : 3,175,116.06 = 519,311.72 : x
2. Step 2: Convert to fraction form
   2,116,738.28/3,175,116.06 = 519,311.72/x
3. Step 3: Cross multiply
   2,116,738.28x = 3,175,116.06 × 519,311.72
4. Step 4: Simplify right side
   2,116,738.28x = 1,648,874,982,318.22
5. Step 5: Solve for x
   x = 1,648,874,982,318.22/2,116,738.28
6. Step 6: Final answer
   x = 778,969.70