Finding the Fourth Proportional to 421,339.59, 581,404.50 and 240,013.53

Step by Step Solution

1. Step 1: Write the proportion equation
   421,339.59 : 581,404.50 = 240,013.53 : x
2. Step 2: Convert to fraction form
   421,339.59/581,404.50 = 240,013.53/x
3. Step 3: Cross multiply
   421,339.59x = 581,404.50 × 240,013.53
4. Step 4: Simplify right side
   421,339.59x = 139,544,946,402.89
5. Step 5: Solve for x
   x = 139,544,946,402.89/421,339.59
6. Step 6: Final answer
   x = 331,193.53