Finding the Fourth Proportional to 8,970.81, 13,456.28 and 3,127.42

Step by Step Solution

1. Step 1: Write the proportion equation
   8,970.81 : 13,456.28 = 3,127.42 : x
2. Step 2: Convert to fraction form
   8,970.81/13,456.28 = 3,127.42/x
3. Step 3: Cross multiply
   8,970.81x = 13,456.28 × 3,127.42
4. Step 4: Simplify right side
   8,970.81x = 42,083,439.20
5. Step 5: Solve for x
   x = 42,083,439.20/8,970.81
6. Step 6: Final answer
   x = 4,691.15