Finding the Fourth Proportional to 13,460.50, 18,576.71 and 7,871.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,460.50 : 18,576.71 = 7,871.50 : x
2. Step 2: Convert to fraction form
   13,460.50/18,576.71 = 7,871.50/x
3. Step 3: Cross multiply
   13,460.50x = 18,576.71 × 7,871.50
4. Step 4: Simplify right side
   13,460.50x = 146,226,572.77
5. Step 5: Solve for x
   x = 146,226,572.77/13,460.50
6. Step 6: Final answer
   x = 10,863.38