Finding the Fourth Proportional to 31,780.69, 43,857.32 and 17,440.60

Step by Step Solution

1. Step 1: Write the proportion equation
   31,780.69 : 43,857.32 = 17,440.60 : x
2. Step 2: Convert to fraction form
   31,780.69/43,857.32 = 17,440.60/x
3. Step 3: Cross multiply
   31,780.69x = 43,857.32 × 17,440.60
4. Step 4: Simplify right side
   31,780.69x = 764,897,860.58
5. Step 5: Solve for x
   x = 764,897,860.58/31,780.69
6. Step 6: Final answer
   x = 24,068.01