Finding the Fourth Proportional to 10,128.06, 15,196.47 and 5,442.60

Step by Step Solution

1. Step 1: Write the proportion equation
   10,128.06 : 15,196.47 = 5,442.60 : x
2. Step 2: Convert to fraction form
   10,128.06/15,196.47 = 5,442.60/x
3. Step 3: Cross multiply
   10,128.06x = 15,196.47 × 5,442.60
4. Step 4: Simplify right side
   10,128.06x = 82,708,307.62
5. Step 5: Solve for x
   x = 82,708,307.62/10,128.06
6. Step 6: Final answer
   x = 8,166.25