Finding the Fourth Proportional to 31,018.32, 42,806.63 and 19,085.63

Step by Step Solution

1. Step 1: Write the proportion equation
   31,018.32 : 42,806.63 = 19,085.63 : x
2. Step 2: Convert to fraction form
   31,018.32/42,806.63 = 19,085.63/x
3. Step 3: Cross multiply
   31,018.32x = 42,806.63 × 19,085.63
4. Step 4: Simplify right side
   31,018.32x = 816,991,335.41
5. Step 5: Solve for x
   x = 816,991,335.41/31,018.32
6. Step 6: Final answer
   x = 26,338.99