Finding the Fourth Proportional to 393,785, 543,423.30 and 214,937

Step by Step Solution

1. Step 1: Write the proportion equation
   393,785 : 543,423.30 = 214,937 : x
2. Step 2: Convert to fraction form
   393,785/543,423.30 = 214,937/x
3. Step 3: Cross multiply
   393,785x = 543,423.30 × 214,937
4. Step 4: Simplify right side
   393,785x = 116,801,773,832.10
5. Step 5: Solve for x
   x = 116,801,773,832.10/393,785
6. Step 6: Final answer
   x = 296,613.06