Finding the Fourth Proportional to 2,116,743.28, 3,175,123.56 and 519,316.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,116,743.28 : 3,175,123.56 = 519,316.72 : x
2. Step 2: Convert to fraction form
   2,116,743.28/3,175,123.56 = 519,316.72/x
3. Step 3: Cross multiply
   2,116,743.28x = 3,175,123.56 × 519,316.72
4. Step 4: Simplify right side
   2,116,743.28x = 1,648,894,752,773.92
5. Step 5: Solve for x
   x = 1,648,894,752,773.92/2,116,743.28
6. Step 6: Final answer
   x = 778,977.20