Finding the Fourth Proportional to 12,870.57, 19,304.03 and 4,976.81

Step by Step Solution

1. Step 1: Write the proportion equation
   12,870.57 : 19,304.03 = 4,976.81 : x
2. Step 2: Convert to fraction form
   12,870.57/19,304.03 = 4,976.81/x
3. Step 3: Cross multiply
   12,870.57x = 19,304.03 × 4,976.81
4. Step 4: Simplify right side
   12,870.57x = 96,072,489.54
5. Step 5: Solve for x
   x = 96,072,489.54/12,870.57
6. Step 6: Final answer
   x = 7,464.51