Finding the Fourth Proportional to 11,722.61, 17,596.07 and 7,854.05

Step by Step Solution

1. Step 1: Write the proportion equation
   11,722.61 : 17,596.07 = 7,854.05 : x
2. Step 2: Convert to fraction form
   11,722.61/17,596.07 = 7,854.05/x
3. Step 3: Cross multiply
   11,722.61x = 17,596.07 × 7,854.05
4. Step 4: Simplify right side
   11,722.61x = 138,200,374.31
5. Step 5: Solve for x
   x = 138,200,374.31/11,722.61
6. Step 6: Final answer
   x = 11,789.22