Finding the Fourth Proportional to 11,438.18, 17,155.52 and 3,118.87

Step by Step Solution

1. Step 1: Write the proportion equation
   11,438.18 : 17,155.52 = 3,118.87 : x
2. Step 2: Convert to fraction form
   11,438.18/17,155.52 = 3,118.87/x
3. Step 3: Cross multiply
   11,438.18x = 17,155.52 × 3,118.87
4. Step 4: Simplify right side
   11,438.18x = 53,505,778.18
5. Step 5: Solve for x
   x = 53,505,778.18/11,438.18
6. Step 6: Final answer
   x = 4,677.82