Finding the Fourth Proportional to 31,055.32, 42,857.22 and 16,908.40

Step by Step Solution

1. Step 1: Write the proportion equation
   31,055.32 : 42,857.22 = 16,908.40 : x
2. Step 2: Convert to fraction form
   31,055.32/42,857.22 = 16,908.40/x
3. Step 3: Cross multiply
   31,055.32x = 42,857.22 × 16,908.40
4. Step 4: Simplify right side
   31,055.32x = 724,647,018.65
5. Step 5: Solve for x
   x = 724,647,018.65/31,055.32
6. Step 6: Final answer
   x = 23,334.07