Finding the Fourth Proportional to 28,045.42, 42,059 and 9,320.42

Step by Step Solution

1. Step 1: Write the proportion equation
   28,045.42 : 42,059 = 9,320.42 : x
2. Step 2: Convert to fraction form
   28,045.42/42,059 = 9,320.42/x
3. Step 3: Cross multiply
   28,045.42x = 42,059 × 9,320.42
4. Step 4: Simplify right side
   28,045.42x = 392,007,544.78
5. Step 5: Solve for x
   x = 392,007,544.78/28,045.42
6. Step 6: Final answer
   x = 13,977.60