Finding the Fourth Proportional to 11,989.78, 17,986.59 and 5,064.34

Step by Step Solution

1. Step 1: Write the proportion equation
   11,989.78 : 17,986.59 = 5,064.34 : x
2. Step 2: Convert to fraction form
   11,989.78/17,986.59 = 5,064.34/x
3. Step 3: Cross multiply
   11,989.78x = 17,986.59 × 5,064.34
4. Step 4: Simplify right side
   11,989.78x = 91,090,207.20
5. Step 5: Solve for x
   x = 91,090,207.20/11,989.78
6. Step 6: Final answer
   x = 7,597.32