Finding the Fourth Proportional to 12,908.76, 19,365.60 and 5,118.18

Step by Step Solution

1. Step 1: Write the proportion equation
   12,908.76 : 19,365.60 = 5,118.18 : x
2. Step 2: Convert to fraction form
   12,908.76/19,365.60 = 5,118.18/x
3. Step 3: Cross multiply
   12,908.76x = 19,365.60 × 5,118.18
4. Step 4: Simplify right side
   12,908.76x = 99,116,626.61
5. Step 5: Solve for x
   x = 99,116,626.61/12,908.76
6. Step 6: Final answer
   x = 7,678.25