Finding the Fourth Proportional to 10,284.83, 15,420.72 and 8,725.37

Step by Step Solution

1. Step 1: Write the proportion equation
   10,284.83 : 15,420.72 = 8,725.37 : x
2. Step 2: Convert to fraction form
   10,284.83/15,420.72 = 8,725.37/x
3. Step 3: Cross multiply
   10,284.83x = 15,420.72 × 8,725.37
4. Step 4: Simplify right side
   10,284.83x = 134,551,487.67
5. Step 5: Solve for x
   x = 134,551,487.67/10,284.83
6. Step 6: Final answer
   x = 13,082.52