Finding the Fourth Proportional to 421,061.52, 581,064.30 and 239,773.48

Step by Step Solution

1. Step 1: Write the proportion equation
   421,061.52 : 581,064.30 = 239,773.48 : x
2. Step 2: Convert to fraction form
   421,061.52/581,064.30 = 239,773.48/x
3. Step 3: Cross multiply
   421,061.52x = 581,064.30 × 239,773.48
4. Step 4: Simplify right side
   421,061.52x = 139,323,809,314.76
5. Step 5: Solve for x
   x = 139,323,809,314.76/421,061.52
6. Step 6: Final answer
   x = 330,887.06