Finding the Fourth Proportional to 31,378.69, 43,302.89 and 17,231.84

Step by Step Solution

1. Step 1: Write the proportion equation
   31,378.69 : 43,302.89 = 17,231.84 : x
2. Step 2: Convert to fraction form
   31,378.69/43,302.89 = 17,231.84/x
3. Step 3: Cross multiply
   31,378.69x = 43,302.89 × 17,231.84
4. Step 4: Simplify right side
   31,378.69x = 746,188,298.58
5. Step 5: Solve for x
   x = 746,188,298.58/31,378.69
6. Step 6: Final answer
   x = 23,780.10