Finding the Fourth Proportional to 13,250.61, 18,277.72 and 7,869.38

Step by Step Solution

1. Step 1: Write the proportion equation
   13,250.61 : 18,277.72 = 7,869.38 : x
2. Step 2: Convert to fraction form
   13,250.61/18,277.72 = 7,869.38/x
3. Step 3: Cross multiply
   13,250.61x = 18,277.72 × 7,869.38
4. Step 4: Simplify right side
   13,250.61x = 143,834,213.15
5. Step 5: Solve for x
   x = 143,834,213.15/13,250.61
6. Step 6: Final answer
   x = 10,854.91