Finding the Fourth Proportional to 31,784, 43,861.92 and 17,639.12

Step by Step Solution

1. Step 1: Write the proportion equation
   31,784 : 43,861.92 = 17,639.12 : x
2. Step 2: Convert to fraction form
   31,784/43,861.92 = 17,639.12/x
3. Step 3: Cross multiply
   31,784x = 43,861.92 × 17,639.12
4. Step 4: Simplify right side
   31,784x = 773,685,670.31
5. Step 5: Solve for x
   x = 773,685,670.31/31,784
6. Step 6: Final answer
   x = 24,341.99