Finding the Fourth Proportional to 10,528, 15,786.71 and 3,505.53

Step by Step Solution

1. Step 1: Write the proportion equation
   10,528 : 15,786.71 = 3,505.53 : x
2. Step 2: Convert to fraction form
   10,528/15,786.71 = 3,505.53/x
3. Step 3: Cross multiply
   10,528x = 15,786.71 × 3,505.53
4. Step 4: Simplify right side
   10,528x = 55,340,785.51
5. Step 5: Solve for x
   x = 55,340,785.51/10,528
6. Step 6: Final answer
   x = 5,256.53