Finding the Fourth Proportional to 13,640.82, 18,824.16 and 7,672.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,640.82 : 18,824.16 = 7,672.50 : x
2. Step 2: Convert to fraction form
   13,640.82/18,824.16 = 7,672.50/x
3. Step 3: Cross multiply
   13,640.82x = 18,824.16 × 7,672.50
4. Step 4: Simplify right side
   13,640.82x = 144,428,367.60
5. Step 5: Solve for x
   x = 144,428,367.60/13,640.82
6. Step 6: Final answer
   x = 10,587.95