Finding the Fourth Proportional to 28,082.84, 42,128.82 and 10,554.08

Step by Step Solution

1. Step 1: Write the proportion equation
   28,082.84 : 42,128.82 = 10,554.08 : x
2. Step 2: Convert to fraction form
   28,082.84/42,128.82 = 10,554.08/x
3. Step 3: Cross multiply
   28,082.84x = 42,128.82 × 10,554.08
4. Step 4: Simplify right side
   28,082.84x = 444,630,936.59
5. Step 5: Solve for x
   x = 444,630,936.59/28,082.84
6. Step 6: Final answer
   x = 15,832.83