Finding the Fourth Proportional to 436,978.23, 603,020.68 and 243,385.34

Step by Step Solution

1. Step 1: Write the proportion equation
   436,978.23 : 603,020.68 = 243,385.34 : x
2. Step 2: Convert to fraction form
   436,978.23/603,020.68 = 243,385.34/x
3. Step 3: Cross multiply
   436,978.23x = 603,020.68 × 243,385.34
4. Step 4: Simplify right side
   436,978.23x = 146,766,393,228.83
5. Step 5: Solve for x
   x = 146,766,393,228.83/436,978.23
6. Step 6: Final answer
   x = 335,866.60