Finding the Fourth Proportional to 10,152.50, 15,221.81 and 5,409.37

Step by Step Solution

1. Step 1: Write the proportion equation
   10,152.50 : 15,221.81 = 5,409.37 : x
2. Step 2: Convert to fraction form
   10,152.50/15,221.81 = 5,409.37/x
3. Step 3: Cross multiply
   10,152.50x = 15,221.81 × 5,409.37
4. Step 4: Simplify right side
   10,152.50x = 82,340,326.25
5. Step 5: Solve for x
   x = 82,340,326.25/10,152.50
6. Step 6: Final answer
   x = 8,110.35