Finding the Fourth Proportional to 42,683.78, 64,028.78 and 16,388.53

Step by Step Solution

1. Step 1: Write the proportion equation
   42,683.78 : 64,028.78 = 16,388.53 : x
2. Step 2: Convert to fraction form
   42,683.78/64,028.78 = 16,388.53/x
3. Step 3: Cross multiply
   42,683.78x = 64,028.78 × 16,388.53
4. Step 4: Simplify right side
   42,683.78x = 1,049,337,401.34
5. Step 5: Solve for x
   x = 1,049,337,401.34/42,683.78
6. Step 6: Final answer
   x = 24,583.99