Finding the Fourth Proportional to 11,987.64, 16,530.06 and 8,401.46

Step by Step Solution

1. Step 1: Write the proportion equation
   11,987.64 : 16,530.06 = 8,401.46 : x
2. Step 2: Convert to fraction form
   11,987.64/16,530.06 = 8,401.46/x
3. Step 3: Cross multiply
   11,987.64x = 16,530.06 × 8,401.46
4. Step 4: Simplify right side
   11,987.64x = 138,876,637.89
5. Step 5: Solve for x
   x = 138,876,637.89/11,987.64
6. Step 6: Final answer
   x = 11,584.99