Finding the Fourth Proportional to 28,618.51, 42,932.37 and 13,828.52

Step by Step Solution

1. Step 1: Write the proportion equation
   28,618.51 : 42,932.37 = 13,828.52 : x
2. Step 2: Convert to fraction form
   28,618.51/42,932.37 = 13,828.52/x
3. Step 3: Cross multiply
   28,618.51x = 42,932.37 × 13,828.52
4. Step 4: Simplify right side
   28,618.51x = 593,690,922.53
5. Step 5: Solve for x
   x = 593,690,922.53/28,618.51
6. Step 6: Final answer
   x = 20,745.00