Finding the Fourth Proportional to 388,607.46, 582,931.98 and 122,388.72

Step by Step Solution

1. Step 1: Write the proportion equation
   388,607.46 : 582,931.98 = 122,388.72 : x
2. Step 2: Convert to fraction form
   388,607.46/582,931.98 = 122,388.72/x
3. Step 3: Cross multiply
   388,607.46x = 582,931.98 × 122,388.72
4. Step 4: Simplify right side
   388,607.46x = 71,344,298,879.27
5. Step 5: Solve for x
   x = 71,344,298,879.27/388,607.46
6. Step 6: Final answer
   x = 183,589.63