Finding the Fourth Proportional to 384,768.50, 530,978.90 and 215,002.62

Step by Step Solution

1. Step 1: Write the proportion equation
   384,768.50 : 530,978.90 = 215,002.62 : x
2. Step 2: Convert to fraction form
   384,768.50/530,978.90 = 215,002.62/x
3. Step 3: Cross multiply
   384,768.50x = 530,978.90 × 215,002.62
4. Step 4: Simplify right side
   384,768.50x = 114,161,853,589.71
5. Step 5: Solve for x
   x = 114,161,853,589.71/384,768.50
6. Step 6: Final answer
   x = 296,702.71