Finding the Fourth Proportional to 19,111.90, 28,672.17 and 5,965.60

Step by Step Solution

1. Step 1: Write the proportion equation
   19,111.90 : 28,672.17 = 5,965.60 : x
2. Step 2: Convert to fraction form
   19,111.90/28,672.17 = 5,965.60/x
3. Step 3: Cross multiply
   19,111.90x = 28,672.17 × 5,965.60
4. Step 4: Simplify right side
   19,111.90x = 171,046,697.35
5. Step 5: Solve for x
   x = 171,046,697.35/19,111.90
6. Step 6: Final answer
   x = 8,949.75