Finding the Fourth Proportional to 28,083.78, 42,104.88 and 13,275.41

Step by Step Solution

1. Step 1: Write the proportion equation
   28,083.78 : 42,104.88 = 13,275.41 : x
2. Step 2: Convert to fraction form
   28,083.78/42,104.88 = 13,275.41/x
3. Step 3: Cross multiply
   28,083.78x = 42,104.88 × 13,275.41
4. Step 4: Simplify right side
   28,083.78x = 558,959,334.48
5. Step 5: Solve for x
   x = 558,959,334.48/28,083.78
6. Step 6: Final answer
   x = 19,903.28