Finding the Fourth Proportional to 28,083.49, 42,104.41 and 13,275.10

Step by Step Solution

1. Step 1: Write the proportion equation
   28,083.49 : 42,104.41 = 13,275.10 : x
2. Step 2: Convert to fraction form
   28,083.49/42,104.41 = 13,275.10/x
3. Step 3: Cross multiply
   28,083.49x = 42,104.41 × 13,275.10
4. Step 4: Simplify right side
   28,083.49x = 558,939,976.29
5. Step 5: Solve for x
   x = 558,939,976.29/28,083.49
6. Step 6: Final answer
   x = 19,902.80