Finding the Fourth Proportional to 19,262.96, 28,889.40 and 5,408.72

Step by Step Solution

1. Step 1: Write the proportion equation
   19,262.96 : 28,889.40 = 5,408.72 : x
2. Step 2: Convert to fraction form
   19,262.96/28,889.40 = 5,408.72/x
3. Step 3: Cross multiply
   19,262.96x = 28,889.40 × 5,408.72
4. Step 4: Simplify right side
   19,262.96x = 156,254,675.57
5. Step 5: Solve for x
   x = 156,254,675.57/19,262.96
6. Step 6: Final answer
   x = 8,111.66