Finding the Fourth Proportional to 12,870.96, 19,293.27 and 8,711.38

Step by Step Solution

1. Step 1: Write the proportion equation
   12,870.96 : 19,293.27 = 8,711.38 : x
2. Step 2: Convert to fraction form
   12,870.96/19,293.27 = 8,711.38/x
3. Step 3: Cross multiply
   12,870.96x = 19,293.27 × 8,711.38
4. Step 4: Simplify right side
   12,870.96x = 168,071,006.41
5. Step 5: Solve for x
   x = 168,071,006.41/12,870.96
6. Step 6: Final answer
   x = 13,058.16