Finding the Fourth Proportional to 28,081.82, 42,134.96 and 16,395.05

Step by Step Solution

1. Step 1: Write the proportion equation
   28,081.82 : 42,134.96 = 16,395.05 : x
2. Step 2: Convert to fraction form
   28,081.82/42,134.96 = 16,395.05/x
3. Step 3: Cross multiply
   28,081.82x = 42,134.96 × 16,395.05
4. Step 4: Simplify right side
   28,081.82x = 690,804,483.30
5. Step 5: Solve for x
   x = 690,804,483.30/28,081.82
6. Step 6: Final answer
   x = 24,599.71