Finding the Fourth Proportional to 11,726.67, 17,599.82 and 10,987.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,726.67 : 17,599.82 = 10,987.72 : x
2. Step 2: Convert to fraction form
   11,726.67/17,599.82 = 10,987.72/x
3. Step 3: Cross multiply
   11,726.67x = 17,599.82 × 10,987.72
4. Step 4: Simplify right side
   11,726.67x = 193,381,795.27
5. Step 5: Solve for x
   x = 193,381,795.27/11,726.67
6. Step 6: Final answer
   x = 16,490.76