Finding the Fourth Proportional to 13,290.54, 18,340.86 and 7,322.07

Step by Step Solution

1. Step 1: Write the proportion equation
   13,290.54 : 18,340.86 = 7,322.07 : x
2. Step 2: Convert to fraction form
   13,290.54/18,340.86 = 7,322.07/x
3. Step 3: Cross multiply
   13,290.54x = 18,340.86 × 7,322.07
4. Step 4: Simplify right side
   13,290.54x = 134,293,060.78
5. Step 5: Solve for x
   x = 134,293,060.78/13,290.54
6. Step 6: Final answer
   x = 10,104.41