Finding the Fourth Proportional to 11,116.40, 16,649.91 and 7,987.01

Step by Step Solution

1. Step 1: Write the proportion equation
   11,116.40 : 16,649.91 = 7,987.01 : x
2. Step 2: Convert to fraction form
   11,116.40/16,649.91 = 7,987.01/x
3. Step 3: Cross multiply
   11,116.40x = 16,649.91 × 7,987.01
4. Step 4: Simplify right side
   11,116.40x = 132,982,914.42
5. Step 5: Solve for x
   x = 132,982,914.42/11,116.40
6. Step 6: Final answer
   x = 11,962.77