Finding the Fourth Proportional to 11,906.31, 17,855.89 and 7,470.71

Step by Step Solution

1. Step 1: Write the proportion equation
   11,906.31 : 17,855.89 = 7,470.71 : x
2. Step 2: Convert to fraction form
   11,906.31/17,855.89 = 7,470.71/x
3. Step 3: Cross multiply
   11,906.31x = 17,855.89 × 7,470.71
4. Step 4: Simplify right side
   11,906.31x = 133,396,068.03
5. Step 5: Solve for x
   x = 133,396,068.03/11,906.31
6. Step 6: Final answer
   x = 11,203.81