Finding the Fourth Proportional to 13,777.24, 19,012.74 and 7,489.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,777.24 : 19,012.74 = 7,489.72 : x
2. Step 2: Convert to fraction form
   13,777.24/19,012.74 = 7,489.72/x
3. Step 3: Cross multiply
   13,777.24x = 19,012.74 × 7,489.72
4. Step 4: Simplify right side
   13,777.24x = 142,400,099.03
5. Step 5: Solve for x
   x = 142,400,099.03/13,777.24
6. Step 6: Final answer
   x = 10,335.89