Finding the Fourth Proportional to 13,453.89, 18,566.46 and 7,485.81

Step by Step Solution

1. Step 1: Write the proportion equation
   13,453.89 : 18,566.46 = 7,485.81 : x
2. Step 2: Convert to fraction form
   13,453.89/18,566.46 = 7,485.81/x
3. Step 3: Cross multiply
   13,453.89x = 18,566.46 × 7,485.81
4. Step 4: Simplify right side
   13,453.89x = 138,984,991.93
5. Step 5: Solve for x
   x = 138,984,991.93/13,453.89
6. Step 6: Final answer
   x = 10,330.47