Finding the Fourth Proportional to 388,586.45, 582,131.83 and 238,388.15

Step by Step Solution

1. Step 1: Write the proportion equation
   388,586.45 : 582,131.83 = 238,388.15 : x
2. Step 2: Convert to fraction form
   388,586.45/582,131.83 = 238,388.15/x
3. Step 3: Cross multiply
   388,586.45x = 582,131.83 × 238,388.15
4. Step 4: Simplify right side
   388,586.45x = 138,773,330,009.81
5. Step 5: Solve for x
   x = 138,773,330,009.81/388,586.45
6. Step 6: Final answer
   x = 357,123.44