Finding the Fourth Proportional to 12,908.34, 19,354.72 and 5,791.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,908.34 : 19,354.72 = 5,791.28 : x
2. Step 2: Convert to fraction form
   12,908.34/19,354.72 = 5,791.28/x
3. Step 3: Cross multiply
   12,908.34x = 19,354.72 × 5,791.28
4. Step 4: Simplify right side
   12,908.34x = 112,088,573.89
5. Step 5: Solve for x
   x = 112,088,573.89/12,908.34
6. Step 6: Final answer
   x = 8,683.42