Finding the Fourth Proportional to 949,078.56, 1,309,728.54 and 519,358.78

Step by Step Solution

1. Step 1: Write the proportion equation
   949,078.56 : 1,309,728.54 = 519,358.78 : x
2. Step 2: Convert to fraction form
   949,078.56/1,309,728.54 = 519,358.78/x
3. Step 3: Cross multiply
   949,078.56x = 1,309,728.54 × 519,358.78
4. Step 4: Simplify right side
   949,078.56x = 680,219,016,665.58
5. Step 5: Solve for x
   x = 680,219,016,665.58/949,078.56
6. Step 6: Final answer
   x = 716,715.19