Finding the Fourth Proportional to 11,167.54, 15,388.99 and 7,971.82

Step by Step Solution

1. Step 1: Write the proportion equation
   11,167.54 : 15,388.99 = 7,971.82 : x
2. Step 2: Convert to fraction form
   11,167.54/15,388.99 = 7,971.82/x
3. Step 3: Cross multiply
   11,167.54x = 15,388.99 × 7,971.82
4. Step 4: Simplify right side
   11,167.54x = 122,678,199.86
5. Step 5: Solve for x
   x = 122,678,199.86/11,167.54
6. Step 6: Final answer
   x = 10,985.25