Finding the Fourth Proportional to 13,685.01, 18,885.35 and 7,397.39

Step by Step Solution

1. Step 1: Write the proportion equation
   13,685.01 : 18,885.35 = 7,397.39 : x
2. Step 2: Convert to fraction form
   13,685.01/18,885.35 = 7,397.39/x
3. Step 3: Cross multiply
   13,685.01x = 18,885.35 × 7,397.39
4. Step 4: Simplify right side
   13,685.01x = 139,702,167.82
5. Step 5: Solve for x
   x = 139,702,167.82/13,685.01
6. Step 6: Final answer
   x = 10,208.41