Finding the Fourth Proportional to 258,964.72, 388,804.86 and 178,814.59

Step by Step Solution

1. Step 1: Write the proportion equation
   258,964.72 : 388,804.86 = 178,814.59 : x
2. Step 2: Convert to fraction form
   258,964.72/388,804.86 = 178,814.59/x
3. Step 3: Cross multiply
   258,964.72x = 388,804.86 × 178,814.59
4. Step 4: Simplify right side
   258,964.72x = 69,523,980,658.90
5. Step 5: Solve for x
   x = 69,523,980,658.90/258,964.72
6. Step 6: Final answer
   x = 268,468.93