Finding the Fourth Proportional to 28,108.82, 42,156.74 and 10,580.42

Step by Step Solution

1. Step 1: Write the proportion equation
   28,108.82 : 42,156.74 = 10,580.42 : x
2. Step 2: Convert to fraction form
   28,108.82/42,156.74 = 10,580.42/x
3. Step 3: Cross multiply
   28,108.82x = 42,156.74 × 10,580.42
4. Step 4: Simplify right side
   28,108.82x = 446,036,015.03
5. Step 5: Solve for x
   x = 446,036,015.03/28,108.82
6. Step 6: Final answer
   x = 15,868.19