Finding the Fourth Proportional to 12,007.22, 17,987.43 and 7,315.59

Step by Step Solution

1. Step 1: Write the proportion equation
   12,007.22 : 17,987.43 = 7,315.59 : x
2. Step 2: Convert to fraction form
   12,007.22/17,987.43 = 7,315.59/x
3. Step 3: Cross multiply
   12,007.22x = 17,987.43 × 7,315.59
4. Step 4: Simplify right side
   12,007.22x = 131,588,656.74
5. Step 5: Solve for x
   x = 131,588,656.74/12,007.22
6. Step 6: Final answer
   x = 10,959.13