Finding the Fourth Proportional to 888,012.72, 1,225,439.28 and 485,604.72

Step by Step Solution

1. Step 1: Write the proportion equation
   888,012.72 : 1,225,439.28 = 485,604.72 : x
2. Step 2: Convert to fraction form
   888,012.72/1,225,439.28 = 485,604.72/x
3. Step 3: Cross multiply
   888,012.72x = 1,225,439.28 × 485,604.72
4. Step 4: Simplify right side
   888,012.72x = 595,079,098,441.40
5. Step 5: Solve for x
   x = 595,079,098,441.40/888,012.72
6. Step 6: Final answer
   x = 670,124.52