Finding the Fourth Proportional to 10,105.74, 15,148.89 and 5,422.32

Step by Step Solution

1. Step 1: Write the proportion equation
   10,105.74 : 15,148.89 = 5,422.32 : x
2. Step 2: Convert to fraction form
   10,105.74/15,148.89 = 5,422.32/x
3. Step 3: Cross multiply
   10,105.74x = 15,148.89 × 5,422.32
4. Step 4: Simplify right side
   10,105.74x = 82,142,129.22
5. Step 5: Solve for x
   x = 82,142,129.22/10,105.74
6. Step 6: Final answer
   x = 8,128.26