Finding the Fourth Proportional to 31,119.87, 42,933.20 and 19,162.47

Step by Step Solution

1. Step 1: Write the proportion equation
   31,119.87 : 42,933.20 = 19,162.47 : x
2. Step 2: Convert to fraction form
   31,119.87/42,933.20 = 19,162.47/x
3. Step 3: Cross multiply
   31,119.87x = 42,933.20 × 19,162.47
4. Step 4: Simplify right side
   31,119.87x = 822,706,061.19
5. Step 5: Solve for x
   x = 822,706,061.19/31,119.87
6. Step 6: Final answer
   x = 26,436.68