Finding the Fourth Proportional to 31,015.56, 42,801.03 and 16,868.10

Step by Step Solution

1. Step 1: Write the proportion equation
   31,015.56 : 42,801.03 = 16,868.10 : x
2. Step 2: Convert to fraction form
   31,015.56/42,801.03 = 16,868.10/x
3. Step 3: Cross multiply
   31,015.56x = 42,801.03 × 16,868.10
4. Step 4: Simplify right side
   31,015.56x = 721,972,054.14
5. Step 5: Solve for x
   x = 721,972,054.14/31,015.56
6. Step 6: Final answer
   x = 23,277.74