Finding the Fourth Proportional to 31,023.84, 42,820.56 and 19,839.36

Step by Step Solution

1. Step 1: Write the proportion equation
   31,023.84 : 42,820.56 = 19,839.36 : x
2. Step 2: Convert to fraction form
   31,023.84/42,820.56 = 19,839.36/x
3. Step 3: Cross multiply
   31,023.84x = 42,820.56 × 19,839.36
4. Step 4: Simplify right side
   31,023.84x = 849,532,505.24
5. Step 5: Solve for x
   x = 849,532,505.24/31,023.84
6. Step 6: Final answer
   x = 27,383.22