Finding the Fourth Proportional to 8,767.58, 12,109.43 and 6,388.34

Step by Step Solution

1. Step 1: Write the proportion equation
   8,767.58 : 12,109.43 = 6,388.34 : x
2. Step 2: Convert to fraction form
   8,767.58/12,109.43 = 6,388.34/x
3. Step 3: Cross multiply
   8,767.58x = 12,109.43 × 6,388.34
4. Step 4: Simplify right side
   8,767.58x = 77,359,111.47
5. Step 5: Solve for x
   x = 77,359,111.47/8,767.58
6. Step 6: Final answer
   x = 8,823.32