Finding the Fourth Proportional to 612,061.12, 844,590.56 and 340,111.78

Step by Step Solution

1. Step 1: Write the proportion equation
   612,061.12 : 844,590.56 = 340,111.78 : x
2. Step 2: Convert to fraction form
   612,061.12/844,590.56 = 340,111.78/x
3. Step 3: Cross multiply
   612,061.12x = 844,590.56 × 340,111.78
4. Step 4: Simplify right side
   612,061.12x = 287,255,198,732.80
5. Step 5: Solve for x
   x = 287,255,198,732.80/612,061.12
6. Step 6: Final answer
   x = 469,324.37