Finding the Fourth Proportional to 13,322.96, 18,386.28 and 7,659.54

Step by Step Solution

1. Step 1: Write the proportion equation
   13,322.96 : 18,386.28 = 7,659.54 : x
2. Step 2: Convert to fraction form
   13,322.96/18,386.28 = 7,659.54/x
3. Step 3: Cross multiply
   13,322.96x = 18,386.28 × 7,659.54
4. Step 4: Simplify right side
   13,322.96x = 140,830,512.23
5. Step 5: Solve for x
   x = 140,830,512.23/13,322.96
6. Step 6: Final answer
   x = 10,570.51