Finding the Fourth Proportional to 11,905.18, 16,425.89 and 7,123.19

Step by Step Solution

1. Step 1: Write the proportion equation
   11,905.18 : 16,425.89 = 7,123.19 : x
2. Step 2: Convert to fraction form
   11,905.18/16,425.89 = 7,123.19/x
3. Step 3: Cross multiply
   11,905.18x = 16,425.89 × 7,123.19
4. Step 4: Simplify right side
   11,905.18x = 117,004,736.75
5. Step 5: Solve for x
   x = 117,004,736.75/11,905.18
6. Step 6: Final answer
   x = 9,828.05