Finding the Fourth Proportional to 11,938.10, 17,907.34 and 3,618.20

Step by Step Solution

1. Step 1: Write the proportion equation
   11,938.10 : 17,907.34 = 3,618.20 : x
2. Step 2: Convert to fraction form
   11,938.10/17,907.34 = 3,618.20/x
3. Step 3: Cross multiply
   11,938.10x = 17,907.34 × 3,618.20
4. Step 4: Simplify right side
   11,938.10x = 64,792,337.59
5. Step 5: Solve for x
   x = 64,792,337.59/11,938.10
6. Step 6: Final answer
   x = 5,427.36