Finding the Fourth Proportional to 13,766.15, 18,997.29 and 7,478.53

Step by Step Solution

1. Step 1: Write the proportion equation
   13,766.15 : 18,997.29 = 7,478.53 : x
2. Step 2: Convert to fraction form
   13,766.15/18,997.29 = 7,478.53/x
3. Step 3: Cross multiply
   13,766.15x = 18,997.29 × 7,478.53
4. Step 4: Simplify right side
   13,766.15x = 142,071,755.69
5. Step 5: Solve for x
   x = 142,071,755.69/13,766.15
6. Step 6: Final answer
   x = 10,320.37