Finding the Fourth Proportional to 28,059.14, 42,090.56 and 9,338.42

Step by Step Solution

1. Step 1: Write the proportion equation
   28,059.14 : 42,090.56 = 9,338.42 : x
2. Step 2: Convert to fraction form
   28,059.14/42,090.56 = 9,338.42/x
3. Step 3: Cross multiply
   28,059.14x = 42,090.56 × 9,338.42
4. Step 4: Simplify right side
   28,059.14x = 393,059,327.32
5. Step 5: Solve for x
   x = 393,059,327.32/28,059.14
6. Step 6: Final answer
   x = 14,008.25