Finding the Fourth Proportional to 11,978.15, 17,950.82 and 7,587.81

Step by Step Solution

1. Step 1: Write the proportion equation
   11,978.15 : 17,950.82 = 7,587.81 : x
2. Step 2: Convert to fraction form
   11,978.15/17,950.82 = 7,587.81/x
3. Step 3: Cross multiply
   11,978.15x = 17,950.82 × 7,587.81
4. Step 4: Simplify right side
   11,978.15x = 136,207,373.57
5. Step 5: Solve for x
   x = 136,207,373.57/11,978.15
6. Step 6: Final answer
   x = 11,371.32