Finding the Fourth Proportional to 13,664.58, 18,856.17 and 8,074.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,664.58 : 18,856.17 = 8,074.50 : x
2. Step 2: Convert to fraction form
   13,664.58/18,856.17 = 8,074.50/x
3. Step 3: Cross multiply
   13,664.58x = 18,856.17 × 8,074.50
4. Step 4: Simplify right side
   13,664.58x = 152,254,144.67
5. Step 5: Solve for x
   x = 152,254,144.67/13,664.58
6. Step 6: Final answer
   x = 11,142.25