Finding the Fourth Proportional to 388,662.42, 581,676.86 and 238,997.51

Step by Step Solution

1. Step 1: Write the proportion equation
   388,662.42 : 581,676.86 = 238,997.51 : x
2. Step 2: Convert to fraction form
   388,662.42/581,676.86 = 238,997.51/x
3. Step 3: Cross multiply
   388,662.42x = 581,676.86 × 238,997.51
4. Step 4: Simplify right side
   388,662.42x = 139,019,317,061.25
5. Step 5: Solve for x
   x = 139,019,317,061.25/388,662.42
6. Step 6: Final answer
   x = 357,686.54