Finding the Fourth Proportional to 469,726.59, 648,390.83 and 278,739.98

Step by Step Solution

1. Step 1: Write the proportion equation
   469,726.59 : 648,390.83 = 278,739.98 : x
2. Step 2: Convert to fraction form
   469,726.59/648,390.83 = 278,739.98/x
3. Step 3: Cross multiply
   469,726.59x = 648,390.83 × 278,739.98
4. Step 4: Simplify right side
   469,726.59x = 180,732,448,429.39
5. Step 5: Solve for x
   x = 180,732,448,429.39/469,726.59
6. Step 6: Final answer
   x = 384,760.95