Finding the Fourth Proportional to 9,767.81, 14,645.55 and 5,388.32

Step by Step Solution

1. Step 1: Write the proportion equation
   9,767.81 : 14,645.55 = 5,388.32 : x
2. Step 2: Convert to fraction form
   9,767.81/14,645.55 = 5,388.32/x
3. Step 3: Cross multiply
   9,767.81x = 14,645.55 × 5,388.32
4. Step 4: Simplify right side
   9,767.81x = 78,914,909.98
5. Step 5: Solve for x
   x = 78,914,909.98/9,767.81
6. Step 6: Final answer
   x = 8,079.08