Finding the Fourth Proportional to 11,171.31, 16,762.43 and 7,905.39

Step by Step Solution

1. Step 1: Write the proportion equation
   11,171.31 : 16,762.43 = 7,905.39 : x
2. Step 2: Convert to fraction form
   11,171.31/16,762.43 = 7,905.39/x
3. Step 3: Cross multiply
   11,171.31x = 16,762.43 × 7,905.39
4. Step 4: Simplify right side
   11,171.31x = 132,513,546.50
5. Step 5: Solve for x
   x = 132,513,546.50/11,171.31
6. Step 6: Final answer
   x = 11,861.95