Finding the Fourth Proportional to 386,606.50, 533,491.33 and 214,513.55

Step by Step Solution

1. Step 1: Write the proportion equation
   386,606.50 : 533,491.33 = 214,513.55 : x
2. Step 2: Convert to fraction form
   386,606.50/533,491.33 = 214,513.55/x
3. Step 3: Cross multiply
   386,606.50x = 533,491.33 × 214,513.55
4. Step 4: Simplify right side
   386,606.50x = 114,441,118,019.95
5. Step 5: Solve for x
   x = 114,441,118,019.95/386,606.50
6. Step 6: Final answer
   x = 296,014.47