Finding the Fourth Proportional to 13,422.27, 20,136.15 and 5,100.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,422.27 : 20,136.15 = 5,100.72 : x
2. Step 2: Convert to fraction form
   13,422.27/20,136.15 = 5,100.72/x
3. Step 3: Cross multiply
   13,422.27x = 20,136.15 × 5,100.72
4. Step 4: Simplify right side
   13,422.27x = 102,708,863.03
5. Step 5: Solve for x
   x = 102,708,863.03/13,422.27
6. Step 6: Final answer
   x = 7,652.12