Finding the Fourth Proportional to 11,317.42, 16,970.43 and 3,919.89

Step by Step Solution

1. Step 1: Write the proportion equation
   11,317.42 : 16,970.43 = 3,919.89 : x
2. Step 2: Convert to fraction form
   11,317.42/16,970.43 = 3,919.89/x
3. Step 3: Cross multiply
   11,317.42x = 16,970.43 × 3,919.89
4. Step 4: Simplify right side
   11,317.42x = 66,522,275.14
5. Step 5: Solve for x
   x = 66,522,275.14/11,317.42
6. Step 6: Final answer
   x = 5,877.87