Finding the Fourth Proportional to 31,007.44, 42,788.55 and 16,860.16

Step by Step Solution

1. Step 1: Write the proportion equation
   31,007.44 : 42,788.55 = 16,860.16 : x
2. Step 2: Convert to fraction form
   31,007.44/42,788.55 = 16,860.16/x
3. Step 3: Cross multiply
   31,007.44x = 42,788.55 × 16,860.16
4. Step 4: Simplify right side
   31,007.44x = 721,421,799.17
5. Step 5: Solve for x
   x = 721,421,799.17/31,007.44
6. Step 6: Final answer
   x = 23,266.09