Finding the Fourth Proportional to 31,119.39, 42,944.56 and 17,690.64

Step by Step Solution

1. Step 1: Write the proportion equation
   31,119.39 : 42,944.56 = 17,690.64 : x
2. Step 2: Convert to fraction form
   31,119.39/42,944.56 = 17,690.64/x
3. Step 3: Cross multiply
   31,119.39x = 42,944.56 × 17,690.64
4. Step 4: Simplify right side
   31,119.39x = 759,716,886.72
5. Step 5: Solve for x
   x = 759,716,886.72/31,119.39
6. Step 6: Final answer
   x = 24,412.97