Finding the Fourth Proportional to 13,664.59, 18,856.27 and 7,695.91

Step by Step Solution

1. Step 1: Write the proportion equation
   13,664.59 : 18,856.27 = 7,695.91 : x
2. Step 2: Convert to fraction form
   13,664.59/18,856.27 = 7,695.91/x
3. Step 3: Cross multiply
   13,664.59x = 18,856.27 × 7,695.91
4. Step 4: Simplify right side
   13,664.59x = 145,116,156.86
5. Step 5: Solve for x
   x = 145,116,156.86/13,664.59
6. Step 6: Final answer
   x = 10,619.87