Finding the Fourth Proportional to 388,297.31, 536,015.61 and 261,046.71

Step by Step Solution

1. Step 1: Write the proportion equation
   388,297.31 : 536,015.61 = 261,046.71 : x
2. Step 2: Convert to fraction form
   388,297.31/536,015.61 = 261,046.71/x
3. Step 3: Cross multiply
   388,297.31x = 536,015.61 × 261,046.71
4. Step 4: Simplify right side
   388,297.31x = 139,925,111,499.14
5. Step 5: Solve for x
   x = 139,925,111,499.14/388,297.31
6. Step 6: Final answer
   x = 360,355.61