Finding the Fourth Proportional to 31,784, 43,850.58 and 19,842.80

Step by Step Solution

1. Step 1: Write the proportion equation
   31,784 : 43,850.58 = 19,842.80 : x
2. Step 2: Convert to fraction form
   31,784/43,850.58 = 19,842.80/x
3. Step 3: Cross multiply
   31,784x = 43,850.58 × 19,842.80
4. Step 4: Simplify right side
   31,784x = 870,118,288.82
5. Step 5: Solve for x
   x = 870,118,288.82/31,784
6. Step 6: Final answer
   x = 27,375.98