Finding the Fourth Proportional to 30,655.61, 42,305.59 and 17,228.09

Step by Step Solution

1. Step 1: Write the proportion equation
   30,655.61 : 42,305.59 = 17,228.09 : x
2. Step 2: Convert to fraction form
   30,655.61/42,305.59 = 17,228.09/x
3. Step 3: Cross multiply
   30,655.61x = 42,305.59 × 17,228.09
4. Step 4: Simplify right side
   30,655.61x = 728,844,639.32
5. Step 5: Solve for x
   x = 728,844,639.32/30,655.61
6. Step 6: Final answer
   x = 23,775.24