Finding the Fourth Proportional to 31,015.32, 42,801.48 and 16,868.16

Step by Step Solution

1. Step 1: Write the proportion equation
   31,015.32 : 42,801.48 = 16,868.16 : x
2. Step 2: Convert to fraction form
   31,015.32/42,801.48 = 16,868.16/x
3. Step 3: Cross multiply
   31,015.32x = 42,801.48 × 16,868.16
4. Step 4: Simplify right side
   31,015.32x = 721,982,212.88
5. Step 5: Solve for x
   x = 721,982,212.88/31,015.32
6. Step 6: Final answer
   x = 23,278.24