Finding the Fourth Proportional to 31,131.50, 42,961.48 and 19,953.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,131.50 : 42,961.48 = 19,953.50 : x
2. Step 2: Convert to fraction form
   31,131.50/42,961.48 = 19,953.50/x
3. Step 3: Cross multiply
   31,131.50x = 42,961.48 × 19,953.50
4. Step 4: Simplify right side
   31,131.50x = 857,231,891.18
5. Step 5: Solve for x
   x = 857,231,891.18/31,131.50
6. Step 6: Final answer
   x = 27,535.84