Finding the Fourth Proportional to 13,663.85, 18,856.18 and 7,695.62

Step by Step Solution

1. Step 1: Write the proportion equation
   13,663.85 : 18,856.18 = 7,695.62 : x
2. Step 2: Convert to fraction form
   13,663.85/18,856.18 = 7,695.62/x
3. Step 3: Cross multiply
   13,663.85x = 18,856.18 × 7,695.62
4. Step 4: Simplify right side
   13,663.85x = 145,109,995.93
5. Step 5: Solve for x
   x = 145,109,995.93/13,663.85
6. Step 6: Final answer
   x = 10,619.99