Finding the Fourth Proportional to 13,118.68, 19,656.13 and 9,216.10

Step by Step Solution

1. Step 1: Write the proportion equation
   13,118.68 : 19,656.13 = 9,216.10 : x
2. Step 2: Convert to fraction form
   13,118.68/19,656.13 = 9,216.10/x
3. Step 3: Cross multiply
   13,118.68x = 19,656.13 × 9,216.10
4. Step 4: Simplify right side
   13,118.68x = 181,152,859.69
5. Step 5: Solve for x
   x = 181,152,859.69/13,118.68
6. Step 6: Final answer
   x = 13,808.77