Finding the Fourth Proportional to 10,522.68, 15,780.59 and 3,500.81

Step by Step Solution

1. Step 1: Write the proportion equation
   10,522.68 : 15,780.59 = 3,500.81 : x
2. Step 2: Convert to fraction form
   10,522.68/15,780.59 = 3,500.81/x
3. Step 3: Cross multiply
   10,522.68x = 15,780.59 × 3,500.81
4. Step 4: Simplify right side
   10,522.68x = 55,244,750.87
5. Step 5: Solve for x
   x = 55,244,750.87/10,522.68
6. Step 6: Final answer
   x = 5,250.06