Finding the Fourth Proportional to 340,241.72, 510,436.38 and 103,578.28

Step by Step Solution

1. Step 1: Write the proportion equation
   340,241.72 : 510,436.38 = 103,578.28 : x
2. Step 2: Convert to fraction form
   340,241.72/510,436.38 = 103,578.28/x
3. Step 3: Cross multiply
   340,241.72x = 510,436.38 × 103,578.28
4. Step 4: Simplify right side
   340,241.72x = 52,870,122,289.83
5. Step 5: Solve for x
   x = 52,870,122,289.83/340,241.72
6. Step 6: Final answer
   x = 155,389.89