Finding the Fourth Proportional to 28,105.28, 42,162.72 and 10,577.60

Step by Step Solution

1. Step 1: Write the proportion equation
   28,105.28 : 42,162.72 = 10,577.60 : x
2. Step 2: Convert to fraction form
   28,105.28/42,162.72 = 10,577.60/x
3. Step 3: Cross multiply
   28,105.28x = 42,162.72 × 10,577.60
4. Step 4: Simplify right side
   28,105.28x = 445,980,387.07
5. Step 5: Solve for x
   x = 445,980,387.07/28,105.28
6. Step 6: Final answer
   x = 15,868.21