Finding the Fourth Proportional to 13,746.72, 18,959.61 and 9,499.35

Step by Step Solution

1. Step 1: Write the proportion equation
   13,746.72 : 18,959.61 = 9,499.35 : x
2. Step 2: Convert to fraction form
   13,746.72/18,959.61 = 9,499.35/x
3. Step 3: Cross multiply
   13,746.72x = 18,959.61 × 9,499.35
4. Step 4: Simplify right side
   13,746.72x = 180,103,971.25
5. Step 5: Solve for x
   x = 180,103,971.25/13,746.72
6. Step 6: Final answer
   x = 13,101.60