Finding the Fourth Proportional to 31,055.87, 42,863.17 and 19,738.55

Step by Step Solution

1. Step 1: Write the proportion equation
   31,055.87 : 42,863.17 = 19,738.55 : x
2. Step 2: Convert to fraction form
   31,055.87/42,863.17 = 19,738.55/x
3. Step 3: Cross multiply
   31,055.87x = 42,863.17 × 19,738.55
4. Step 4: Simplify right side
   31,055.87x = 846,056,824.20
5. Step 5: Solve for x
   x = 846,056,824.20/31,055.87
6. Step 6: Final answer
   x = 27,243.06