Finding the Fourth Proportional to 31,106, 42,926.28 and 19,928

Step by Step Solution

1. Step 1: Write the proportion equation
   31,106 : 42,926.28 = 19,928 : x
2. Step 2: Convert to fraction form
   31,106/42,926.28 = 19,928/x
3. Step 3: Cross multiply
   31,106x = 42,926.28 × 19,928
4. Step 4: Simplify right side
   31,106x = 855,434,907.84
5. Step 5: Solve for x
   x = 855,434,907.84/31,106
6. Step 6: Final answer
   x = 27,500.64