Finding the Fourth Proportional to 388,643.72, 582,980.94 and 108,185.48

Step by Step Solution

1. Step 1: Write the proportion equation
   388,643.72 : 582,980.94 = 108,185.48 : x
2. Step 2: Convert to fraction form
   388,643.72/582,980.94 = 108,185.48/x
3. Step 3: Cross multiply
   388,643.72x = 582,980.94 × 108,185.48
4. Step 4: Simplify right side
   388,643.72x = 63,070,072,824.75
5. Step 5: Solve for x
   x = 63,070,072,824.75/388,643.72
6. Step 6: Final answer
   x = 162,282.50