Finding the Fourth Proportional to 28,458.82, 42,694.58 and 8,739.37

Step by Step Solution

1. Step 1: Write the proportion equation
   28,458.82 : 42,694.58 = 8,739.37 : x
2. Step 2: Convert to fraction form
   28,458.82/42,694.58 = 8,739.37/x
3. Step 3: Cross multiply
   28,458.82x = 42,694.58 × 8,739.37
4. Step 4: Simplify right side
   28,458.82x = 373,123,731.61
5. Step 5: Solve for x
   x = 373,123,731.61/28,458.82
6. Step 6: Final answer
   x = 13,111.01