Finding the Fourth Proportional to 12,388.77, 17,095.91 and 7,084.17

Step by Step Solution

1. Step 1: Write the proportion equation
   12,388.77 : 17,095.91 = 7,084.17 : x
2. Step 2: Convert to fraction form
   12,388.77/17,095.91 = 7,084.17/x
3. Step 3: Cross multiply
   12,388.77x = 17,095.91 × 7,084.17
4. Step 4: Simplify right side
   12,388.77x = 121,110,297.32
5. Step 5: Solve for x
   x = 121,110,297.32/12,388.77
6. Step 6: Final answer
   x = 9,775.81