Finding the Fourth Proportional to 12,756.24, 17,603.60 and 7,090.81

Step by Step Solution

1. Step 1: Write the proportion equation
   12,756.24 : 17,603.60 = 7,090.81 : x
2. Step 2: Convert to fraction form
   12,756.24/17,603.60 = 7,090.81/x
3. Step 3: Cross multiply
   12,756.24x = 17,603.60 × 7,090.81
4. Step 4: Simplify right side
   12,756.24x = 124,823,782.92
5. Step 5: Solve for x
   x = 124,823,782.92/12,756.24
6. Step 6: Final answer
   x = 9,785.31