Finding the Fourth Proportional to 388,314.50, 581,630.43 and 188,216.29

Step by Step Solution

1. Step 1: Write the proportion equation
   388,314.50 : 581,630.43 = 188,216.29 : x
2. Step 2: Convert to fraction form
   388,314.50/581,630.43 = 188,216.29/x
3. Step 3: Cross multiply
   388,314.50x = 581,630.43 × 188,216.29
4. Step 4: Simplify right side
   388,314.50x = 109,472,321,685.71
5. Step 5: Solve for x
   x = 109,472,321,685.71/388,314.50
6. Step 6: Final answer
   x = 281,916.65