Finding the Fourth Proportional to 11,878.32, 17,808.82 and 7,722.48

Step by Step Solution

1. Step 1: Write the proportion equation
   11,878.32 : 17,808.82 = 7,722.48 : x
2. Step 2: Convert to fraction form
   11,878.32/17,808.82 = 7,722.48/x
3. Step 3: Cross multiply
   11,878.32x = 17,808.82 × 7,722.48
4. Step 4: Simplify right side
   11,878.32x = 137,528,256.27
5. Step 5: Solve for x
   x = 137,528,256.27/11,878.32
6. Step 6: Final answer
   x = 11,578.09