Finding the Fourth Proportional to 13,643.06, 18,827.22 and 7,674.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,643.06 : 18,827.22 = 7,674.72 : x
2. Step 2: Convert to fraction form
   13,643.06/18,827.22 = 7,674.72/x
3. Step 3: Cross multiply
   13,643.06x = 18,827.22 × 7,674.72
4. Step 4: Simplify right side
   13,643.06x = 144,493,641.88
5. Step 5: Solve for x
   x = 144,493,641.88/13,643.06
6. Step 6: Final answer
   x = 10,591.00