Finding the Fourth Proportional to 28,046.95, 42,061.32 and 9,321.96

Step by Step Solution

1. Step 1: Write the proportion equation
   28,046.95 : 42,061.32 = 9,321.96 : x
2. Step 2: Convert to fraction form
   28,046.95/42,061.32 = 9,321.96/x
3. Step 3: Cross multiply
   28,046.95x = 42,061.32 × 9,321.96
4. Step 4: Simplify right side
   28,046.95x = 392,093,942.59
5. Step 5: Solve for x
   x = 392,093,942.59/28,046.95
6. Step 6: Final answer
   x = 13,979.91