Finding the Fourth Proportional to 388,298.31, 536,016.99 and 261,047.71

Step by Step Solution

1. Step 1: Write the proportion equation
   388,298.31 : 536,016.99 = 261,047.71 : x
2. Step 2: Convert to fraction form
   388,298.31/536,016.99 = 261,047.71/x
3. Step 3: Cross multiply
   388,298.31x = 536,016.99 × 261,047.71
4. Step 4: Simplify right side
   388,298.31x = 139,926,007,760.59
5. Step 5: Solve for x
   x = 139,926,007,760.59/388,298.31
6. Step 6: Final answer
   x = 360,356.98