Finding the Fourth Proportional to 12,110.04, 18,066.61 and 10,978.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,110.04 : 18,066.61 = 10,978.28 : x
2. Step 2: Convert to fraction form
   12,110.04/18,066.61 = 10,978.28/x
3. Step 3: Cross multiply
   12,110.04x = 18,066.61 × 10,978.28
4. Step 4: Simplify right side
   12,110.04x = 198,340,303.23
5. Step 5: Solve for x
   x = 198,340,303.23/12,110.04
6. Step 6: Final answer
   x = 16,378.17