Finding the Fourth Proportional to 13,297.84, 18,353.70 and 7,636.42

Step by Step Solution

1. Step 1: Write the proportion equation
   13,297.84 : 18,353.70 = 7,636.42 : x
2. Step 2: Convert to fraction form
   13,297.84/18,353.70 = 7,636.42/x
3. Step 3: Cross multiply
   13,297.84x = 18,353.70 × 7,636.42
4. Step 4: Simplify right side
   13,297.84x = 140,156,561.75
5. Step 5: Solve for x
   x = 140,156,561.75/13,297.84
6. Step 6: Final answer
   x = 10,539.80