Finding the Fourth Proportional to 8,785.77, 12,128.33 and 5,603.34

Step by Step Solution

1. Step 1: Write the proportion equation
   8,785.77 : 12,128.33 = 5,603.34 : x
2. Step 2: Convert to fraction form
   8,785.77/12,128.33 = 5,603.34/x
3. Step 3: Cross multiply
   8,785.77x = 12,128.33 × 5,603.34
4. Step 4: Simplify right side
   8,785.77x = 67,959,128.61
5. Step 5: Solve for x
   x = 67,959,128.61/8,785.77
6. Step 6: Final answer
   x = 7,735.14