Finding the Fourth Proportional to 28,386.24, 42,535.60 and 17,976.12

Step by Step Solution

1. Step 1: Write the proportion equation
   28,386.24 : 42,535.60 = 17,976.12 : x
2. Step 2: Convert to fraction form
   28,386.24/42,535.60 = 17,976.12/x
3. Step 3: Cross multiply
   28,386.24x = 42,535.60 × 17,976.12
4. Step 4: Simplify right side
   28,386.24x = 764,625,049.87
5. Step 5: Solve for x
   x = 764,625,049.87/28,386.24
6. Step 6: Final answer
   x = 26,936.47