Finding the Fourth Proportional to 28,123.72, 42,171.67 and 9,397.33

Step by Step Solution

1. Step 1: Write the proportion equation
   28,123.72 : 42,171.67 = 9,397.33 : x
2. Step 2: Convert to fraction form
   28,123.72/42,171.67 = 9,397.33/x
3. Step 3: Cross multiply
   28,123.72x = 42,171.67 × 9,397.33
4. Step 4: Simplify right side
   28,123.72x = 396,301,099.64
5. Step 5: Solve for x
   x = 396,301,099.64/28,123.72
6. Step 6: Final answer
   x = 14,091.35