Finding the Fourth Proportional to 10,528.67, 15,708.04 and 10,145.81

Step by Step Solution

1. Step 1: Write the proportion equation
   10,528.67 : 15,708.04 = 10,145.81 : x
2. Step 2: Convert to fraction form
   10,528.67/15,708.04 = 10,145.81/x
3. Step 3: Cross multiply
   10,528.67x = 15,708.04 × 10,145.81
4. Step 4: Simplify right side
   10,528.67x = 159,370,789.31
5. Step 5: Solve for x
   x = 159,370,789.31/10,528.67
6. Step 6: Final answer
   x = 15,136.84