Finding the Fourth Proportional to 31,097.20, 42,928.50 and 18,346.06

Step by Step Solution

1. Step 1: Write the proportion equation
   31,097.20 : 42,928.50 = 18,346.06 : x
2. Step 2: Convert to fraction form
   31,097.20/42,928.50 = 18,346.06/x
3. Step 3: Cross multiply
   31,097.20x = 42,928.50 × 18,346.06
4. Step 4: Simplify right side
   31,097.20x = 787,568,836.71
5. Step 5: Solve for x
   x = 787,568,836.71/31,097.20
6. Step 6: Final answer
   x = 25,326.04