Finding the Fourth Proportional to 877,142.34, 1,315,760.16 and 278,150.76

Step by Step Solution

1. Step 1: Write the proportion equation
   877,142.34 : 1,315,760.16 = 278,150.76 : x
2. Step 2: Convert to fraction form
   877,142.34/1,315,760.16 = 278,150.76/x
3. Step 3: Cross multiply
   877,142.34x = 1,315,760.16 × 278,150.76
4. Step 4: Simplify right side
   877,142.34x = 365,979,688,481.72
5. Step 5: Solve for x
   x = 365,979,688,481.72/877,142.34
6. Step 6: Final answer
   x = 417,240.93