Finding the Fourth Proportional to 31,015.08, 42,802.56 and 16,867.64

Step by Step Solution

1. Step 1: Write the proportion equation
   31,015.08 : 42,802.56 = 16,867.64 : x
2. Step 2: Convert to fraction form
   31,015.08/42,802.56 = 16,867.64/x
3. Step 3: Cross multiply
   31,015.08x = 42,802.56 × 16,867.64
4. Step 4: Simplify right side
   31,015.08x = 721,978,173.16
5. Step 5: Solve for x
   x = 721,978,173.16/31,015.08
6. Step 6: Final answer
   x = 23,278.29