Finding the Fourth Proportional to 31,292.09, 43,188.76 and 19,965.10

Step by Step Solution

1. Step 1: Write the proportion equation
   31,292.09 : 43,188.76 = 19,965.10 : x
2. Step 2: Convert to fraction form
   31,292.09/43,188.76 = 19,965.10/x
3. Step 3: Cross multiply
   31,292.09x = 43,188.76 × 19,965.10
4. Step 4: Simplify right side
   31,292.09x = 862,267,959.89
5. Step 5: Solve for x
   x = 862,267,959.89/31,292.09
6. Step 6: Final answer
   x = 27,555.46