Finding the Fourth Proportional to 12,635.39, 18,916.38 and 7,354.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,635.39 : 18,916.38 = 7,354.28 : x
2. Step 2: Convert to fraction form
   12,635.39/18,916.38 = 7,354.28/x
3. Step 3: Cross multiply
   12,635.39x = 18,916.38 × 7,354.28
4. Step 4: Simplify right side
   12,635.39x = 139,116,402.40
5. Step 5: Solve for x
   x = 139,116,402.40/12,635.39
6. Step 6: Final answer
   x = 11,010.06