Finding the Fourth Proportional to 31,138.27, 42,970.59 and 17,709.51

Step by Step Solution

1. Step 1: Write the proportion equation
   31,138.27 : 42,970.59 = 17,709.51 : x
2. Step 2: Convert to fraction form
   31,138.27/42,970.59 = 17,709.51/x
3. Step 3: Cross multiply
   31,138.27x = 42,970.59 × 17,709.51
4. Step 4: Simplify right side
   31,138.27x = 760,988,093.31
5. Step 5: Solve for x
   x = 760,988,093.31/31,138.27
6. Step 6: Final answer
   x = 24,439.00