Finding the Fourth Proportional to 13,507.33, 18,640.50 and 7,538.88

Step by Step Solution

1. Step 1: Write the proportion equation
   13,507.33 : 18,640.50 = 7,538.88 : x
2. Step 2: Convert to fraction form
   13,507.33/18,640.50 = 7,538.88/x
3. Step 3: Cross multiply
   13,507.33x = 18,640.50 × 7,538.88
4. Step 4: Simplify right side
   13,507.33x = 140,528,492.64
5. Step 5: Solve for x
   x = 140,528,492.64/13,507.33
6. Step 6: Final answer
   x = 10,403.87