Finding the Fourth Proportional to 12,395.51, 17,100.91 and 7,087.47

Step by Step Solution

1. Step 1: Write the proportion equation
   12,395.51 : 17,100.91 = 7,087.47 : x
2. Step 2: Convert to fraction form
   12,395.51/17,100.91 = 7,087.47/x
3. Step 3: Cross multiply
   12,395.51x = 17,100.91 × 7,087.47
4. Step 4: Simplify right side
   12,395.51x = 121,202,186.60
5. Step 5: Solve for x
   x = 121,202,186.60/12,395.51
6. Step 6: Final answer
   x = 9,777.91