Finding the Fourth Proportional to 30,560.51, 42,175.28 and 17,136.15

Step by Step Solution

1. Step 1: Write the proportion equation
   30,560.51 : 42,175.28 = 17,136.15 : x
2. Step 2: Convert to fraction form
   30,560.51/42,175.28 = 17,136.15/x
3. Step 3: Cross multiply
   30,560.51x = 42,175.28 × 17,136.15
4. Step 4: Simplify right side
   30,560.51x = 722,721,838.69
5. Step 5: Solve for x
   x = 722,721,838.69/30,560.51
6. Step 6: Final answer
   x = 23,648.88