Finding the Fourth Proportional to 384,213.38, 529,721.50 and 315,047.98

Step by Step Solution

1. Step 1: Write the proportion equation
   384,213.38 : 529,721.50 = 315,047.98 : x
2. Step 2: Convert to fraction form
   384,213.38/529,721.50 = 315,047.98/x
3. Step 3: Cross multiply
   384,213.38x = 529,721.50 × 315,047.98
4. Step 4: Simplify right side
   384,213.38x = 166,887,688,537.57
5. Step 5: Solve for x
   x = 166,887,688,537.57/384,213.38
6. Step 6: Final answer
   x = 434,361.99