Finding the Fourth Proportional to 16,618.31, 24,931.55 and 4,931.53

Step by Step Solution

1. Step 1: Write the proportion equation
   16,618.31 : 24,931.55 = 4,931.53 : x
2. Step 2: Convert to fraction form
   16,618.31/24,931.55 = 4,931.53/x
3. Step 3: Cross multiply
   16,618.31x = 24,931.55 × 4,931.53
4. Step 4: Simplify right side
   16,618.31x = 122,950,749.27
5. Step 5: Solve for x
   x = 122,950,749.27/16,618.31
6. Step 6: Final answer
   x = 7,398.51