Finding the Fourth Proportional to 31,005.22, 42,787.75 and 16,858.16

Step by Step Solution

1. Step 1: Write the proportion equation
   31,005.22 : 42,787.75 = 16,858.16 : x
2. Step 2: Convert to fraction form
   31,005.22/42,787.75 = 16,858.16/x
3. Step 3: Cross multiply
   31,005.22x = 42,787.75 × 16,858.16
4. Step 4: Simplify right side
   31,005.22x = 721,322,735.54
5. Step 5: Solve for x
   x = 721,322,735.54/31,005.22
6. Step 6: Final answer
   x = 23,264.56