Finding the Fourth Proportional to 13,421.53, 18,522.89 and 7,454.37

Step by Step Solution

1. Step 1: Write the proportion equation
   13,421.53 : 18,522.89 = 7,454.37 : x
2. Step 2: Convert to fraction form
   13,421.53/18,522.89 = 7,454.37/x
3. Step 3: Cross multiply
   13,421.53x = 18,522.89 × 7,454.37
4. Step 4: Simplify right side
   13,421.53x = 138,076,475.53
5. Step 5: Solve for x
   x = 138,076,475.53/13,421.53
6. Step 6: Final answer
   x = 10,287.69