Finding the Fourth Proportional to 31,780.91, 43,839.42 and 19,823.48

Step by Step Solution

1. Step 1: Write the proportion equation
   31,780.91 : 43,839.42 = 19,823.48 : x
2. Step 2: Convert to fraction form
   31,780.91/43,839.42 = 19,823.48/x
3. Step 3: Cross multiply
   31,780.91x = 43,839.42 × 19,823.48
4. Step 4: Simplify right side
   31,780.91x = 869,049,805.54
5. Step 5: Solve for x
   x = 869,049,805.54/31,780.91
6. Step 6: Final answer
   x = 27,345.03