Finding the Fourth Proportional to 13,469.50, 18,587.91 and 7,881.58

Step by Step Solution

1. Step 1: Write the proportion equation
   13,469.50 : 18,587.91 = 7,881.58 : x
2. Step 2: Convert to fraction form
   13,469.50/18,587.91 = 7,881.58/x
3. Step 3: Cross multiply
   13,469.50x = 18,587.91 × 7,881.58
4. Step 4: Simplify right side
   13,469.50x = 146,502,099.70
5. Step 5: Solve for x
   x = 146,502,099.70/13,469.50
6. Step 6: Final answer
   x = 10,876.58