Finding the Fourth Proportional to 13,766.06, 18,997.18 and 7,478.48

Step by Step Solution

1. Step 1: Write the proportion equation
   13,766.06 : 18,997.18 = 7,478.48 : x
2. Step 2: Convert to fraction form
   13,766.06/18,997.18 = 7,478.48/x
3. Step 3: Cross multiply
   13,766.06x = 18,997.18 × 7,478.48
4. Step 4: Simplify right side
   13,766.06x = 142,070,030.69
5. Step 5: Solve for x
   x = 142,070,030.69/13,766.06
6. Step 6: Final answer
   x = 10,320.31