Finding the Fourth Proportional to 12,987.56, 17,914.52 and 9,007.22

Step by Step Solution

1. Step 1: Write the proportion equation
   12,987.56 : 17,914.52 = 9,007.22 : x
2. Step 2: Convert to fraction form
   12,987.56/17,914.52 = 9,007.22/x
3. Step 3: Cross multiply
   12,987.56x = 17,914.52 × 9,007.22
4. Step 4: Simplify right side
   12,987.56x = 161,359,955.53
5. Step 5: Solve for x
   x = 161,359,955.53/12,987.56
6. Step 6: Final answer
   x = 12,424.20