Finding the Fourth Proportional to 13,321.82, 18,384.66 and 7,656.48

Step by Step Solution

1. Step 1: Write the proportion equation
   13,321.82 : 18,384.66 = 7,656.48 : x
2. Step 2: Convert to fraction form
   13,321.82/18,384.66 = 7,656.48/x
3. Step 3: Cross multiply
   13,321.82x = 18,384.66 × 7,656.48
4. Step 4: Simplify right side
   13,321.82x = 140,761,781.60
5. Step 5: Solve for x
   x = 140,761,781.60/13,321.82
6. Step 6: Final answer
   x = 10,566.26