Finding the Fourth Proportional to 17,120.72, 25,683.64 and 5,434.32

Step by Step Solution

1. Step 1: Write the proportion equation
   17,120.72 : 25,683.64 = 5,434.32 : x
2. Step 2: Convert to fraction form
   17,120.72/25,683.64 = 5,434.32/x
3. Step 3: Cross multiply
   17,120.72x = 25,683.64 × 5,434.32
4. Step 4: Simplify right side
   17,120.72x = 139,573,118.52
5. Step 5: Solve for x
   x = 139,573,118.52/17,120.72
6. Step 6: Final answer
   x = 8,152.29