Finding the Fourth Proportional to 31,013.28, 42,798.78 and 19,069.56

Step by Step Solution

1. Step 1: Write the proportion equation
   31,013.28 : 42,798.78 = 19,069.56 : x
2. Step 2: Convert to fraction form
   31,013.28/42,798.78 = 19,069.56/x
3. Step 3: Cross multiply
   31,013.28x = 42,798.78 × 19,069.56
4. Step 4: Simplify right side
   31,013.28x = 816,153,903.14
5. Step 5: Solve for x
   x = 816,153,903.14/31,013.28
6. Step 6: Final answer
   x = 26,316.27