Finding the Fourth Proportional to 28,256.10, 42,405.21 and 10,760.10

Step by Step Solution

1. Step 1: Write the proportion equation
   28,256.10 : 42,405.21 = 10,760.10 : x
2. Step 2: Convert to fraction form
   28,256.10/42,405.21 = 10,760.10/x
3. Step 3: Cross multiply
   28,256.10x = 42,405.21 × 10,760.10
4. Step 4: Simplify right side
   28,256.10x = 456,284,300.12
5. Step 5: Solve for x
   x = 456,284,300.12/28,256.10
6. Step 6: Final answer
   x = 16,148.17