Finding the Fourth Proportional to 31,131.75, 42,961.83 and 19,953.75

Step by Step Solution

1. Step 1: Write the proportion equation
   31,131.75 : 42,961.83 = 19,953.75 : x
2. Step 2: Convert to fraction form
   31,131.75/42,961.83 = 19,953.75/x
3. Step 3: Cross multiply
   31,131.75x = 42,961.83 × 19,953.75
4. Step 4: Simplify right side
   31,131.75x = 857,249,615.36
5. Step 5: Solve for x
   x = 857,249,615.36/31,131.75
6. Step 6: Final answer
   x = 27,536.18