Finding the Fourth Proportional to 12,870.82, 19,304.40 and 4,977.06

Step by Step Solution

1. Step 1: Write the proportion equation
   12,870.82 : 19,304.40 = 4,977.06 : x
2. Step 2: Convert to fraction form
   12,870.82/19,304.40 = 4,977.06/x
3. Step 3: Cross multiply
   12,870.82x = 19,304.40 × 4,977.06
4. Step 4: Simplify right side
   12,870.82x = 96,079,157.06
5. Step 5: Solve for x
   x = 96,079,157.06/12,870.82
6. Step 6: Final answer
   x = 7,464.88