Finding the Fourth Proportional to 13,200.84, 18,215.28 and 7,536.60

Step by Step Solution

1. Step 1: Write the proportion equation
   13,200.84 : 18,215.28 = 7,536.60 : x
2. Step 2: Convert to fraction form
   13,200.84/18,215.28 = 7,536.60/x
3. Step 3: Cross multiply
   13,200.84x = 18,215.28 × 7,536.60
4. Step 4: Simplify right side
   13,200.84x = 137,281,279.25
5. Step 5: Solve for x
   x = 137,281,279.25/13,200.84
6. Step 6: Final answer
   x = 10,399.44