Finding the Fourth Proportional to 654,503.69, 903,067.99 and 378,818.78

Step by Step Solution

1. Step 1: Write the proportion equation
   654,503.69 : 903,067.99 = 378,818.78 : x
2. Step 2: Convert to fraction form
   654,503.69/903,067.99 = 378,818.78/x
3. Step 3: Cross multiply
   654,503.69x = 903,067.99 × 378,818.78
4. Step 4: Simplify right side
   654,503.69x = 342,099,108,766.47
5. Step 5: Solve for x
   x = 342,099,108,766.47/654,503.69
6. Step 6: Final answer
   x = 522,684.77