Finding the Fourth Proportional to 31,127.88, 42,960.66 and 19,798.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,127.88 : 42,960.66 = 19,798.50 : x
2. Step 2: Convert to fraction form
   31,127.88/42,960.66 = 19,798.50/x
3. Step 3: Cross multiply
   31,127.88x = 42,960.66 × 19,798.50
4. Step 4: Simplify right side
   31,127.88x = 850,556,627.01
5. Step 5: Solve for x
   x = 850,556,627.01/31,127.88
6. Step 6: Final answer
   x = 27,324.59