Finding the Fourth Proportional to 13,420.82, 18,521.33 and 7,452.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,420.82 : 18,521.33 = 7,452.50 : x
2. Step 2: Convert to fraction form
   13,420.82/18,521.33 = 7,452.50/x
3. Step 3: Cross multiply
   13,420.82x = 18,521.33 × 7,452.50
4. Step 4: Simplify right side
   13,420.82x = 138,030,081.96
5. Step 5: Solve for x
   x = 138,030,081.96/13,420.82
6. Step 6: Final answer
   x = 10,284.77