Finding the Fourth Proportional to 11,991.72, 17,978.94 and 7,365

Step by Step Solution

1. Step 1: Write the proportion equation
   11,991.72 : 17,978.94 = 7,365 : x
2. Step 2: Convert to fraction form
   11,991.72/17,978.94 = 7,365/x
3. Step 3: Cross multiply
   11,991.72x = 17,978.94 × 7,365
4. Step 4: Simplify right side
   11,991.72x = 132,414,893.10
5. Step 5: Solve for x
   x = 132,414,893.10/11,991.72
6. Step 6: Final answer
   x = 11,042.19