Finding the Fourth Proportional to 13,587.08, 18,749.32 and 7,618.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,587.08 : 18,749.32 = 7,618.72 : x
2. Step 2: Convert to fraction form
   13,587.08/18,749.32 = 7,618.72/x
3. Step 3: Cross multiply
   13,587.08x = 18,749.32 × 7,618.72
4. Step 4: Simplify right side
   13,587.08x = 142,845,819.27
5. Step 5: Solve for x
   x = 142,845,819.27/13,587.08
6. Step 6: Final answer
   x = 10,513.36