Finding the Fourth Proportional to 11,931.37, 17,777.15 and 11,260.69

Step by Step Solution

1. Step 1: Write the proportion equation
   11,931.37 : 17,777.15 = 11,260.69 : x
2. Step 2: Convert to fraction form
   11,931.37/17,777.15 = 11,260.69/x
3. Step 3: Cross multiply
   11,931.37x = 17,777.15 × 11,260.69
4. Step 4: Simplify right side
   11,931.37x = 200,182,980.06
5. Step 5: Solve for x
   x = 200,182,980.06/11,931.37
6. Step 6: Final answer
   x = 16,777.87