Finding the Fourth Proportional to 13,172.31, 18,176.00 and 7,866

Step by Step Solution

1. Step 1: Write the proportion equation
   13,172.31 : 18,176.00 = 7,866 : x
2. Step 2: Convert to fraction form
   13,172.31/18,176.00 = 7,866/x
3. Step 3: Cross multiply
   13,172.31x = 18,176.00 × 7,866
4. Step 4: Simplify right side
   13,172.31x = 142,972,376.67
5. Step 5: Solve for x
   x = 142,972,376.67/13,172.31
6. Step 6: Final answer
   x = 10,854.01