Finding the Fourth Proportional to 13,100.88, 18,064.32 and 9,951.60

Step by Step Solution

1. Step 1: Write the proportion equation
   13,100.88 : 18,064.32 = 9,951.60 : x
2. Step 2: Convert to fraction form
   13,100.88/18,064.32 = 9,951.60/x
3. Step 3: Cross multiply
   13,100.88x = 18,064.32 × 9,951.60
4. Step 4: Simplify right side
   13,100.88x = 179,768,886.91
5. Step 5: Solve for x
   x = 179,768,886.91/13,100.88
6. Step 6: Final answer
   x = 13,721.89