Finding the Fourth Proportional to 876,870.72, 1,315,409.76 and 277,859.52

Step by Step Solution

1. Step 1: Write the proportion equation
   876,870.72 : 1,315,409.76 = 277,859.52 : x
2. Step 2: Convert to fraction form
   876,870.72/1,315,409.76 = 277,859.52/x
3. Step 3: Cross multiply
   876,870.72x = 1,315,409.76 × 277,859.52
4. Step 4: Simplify right side
   876,870.72x = 365,499,124,516.92
5. Step 5: Solve for x
   x = 365,499,124,516.92/876,870.72
6. Step 6: Final answer
   x = 416,822.13