Finding the Fourth Proportional to 31,784.13, 43,870.61 and 19,840.27

Step by Step Solution

1. Step 1: Write the proportion equation
   31,784.13 : 43,870.61 = 19,840.27 : x
2. Step 2: Convert to fraction form
   31,784.13/43,870.61 = 19,840.27/x
3. Step 3: Cross multiply
   31,784.13x = 43,870.61 × 19,840.27
4. Step 4: Simplify right side
   31,784.13x = 870,404,757.94
5. Step 5: Solve for x
   x = 870,404,757.94/31,784.13
6. Step 6: Final answer
   x = 27,384.89