Finding the Fourth Proportional to 384,300.72, 577,325.88 and 278,012.52

Step by Step Solution

1. Step 1: Write the proportion equation
   384,300.72 : 577,325.88 = 278,012.52 : x
2. Step 2: Convert to fraction form
   384,300.72/577,325.88 = 278,012.52/x
3. Step 3: Cross multiply
   384,300.72x = 577,325.88 × 278,012.52
4. Step 4: Simplify right side
   384,300.72x = 160,503,822,760.02
5. Step 5: Solve for x
   x = 160,503,822,760.02/384,300.72
6. Step 6: Final answer
   x = 417,651.63