Finding the Fourth Proportional to 13,777.37, 19,012.91 and 7,489.74

Step by Step Solution

1. Step 1: Write the proportion equation
   13,777.37 : 19,012.91 = 7,489.74 : x
2. Step 2: Convert to fraction form
   13,777.37/19,012.91 = 7,489.74/x
3. Step 3: Cross multiply
   13,777.37x = 19,012.91 × 7,489.74
4. Step 4: Simplify right side
   13,777.37x = 142,401,715.09
5. Step 5: Solve for x
   x = 142,401,715.09/13,777.37
6. Step 6: Final answer
   x = 10,335.92