Finding the Fourth Proportional to 31,121.76, 42,969.06 and 23,938.92

Step by Step Solution

1. Step 1: Write the proportion equation
   31,121.76 : 42,969.06 = 23,938.92 : x
2. Step 2: Convert to fraction form
   31,121.76/42,969.06 = 23,938.92/x
3. Step 3: Cross multiply
   31,121.76x = 42,969.06 × 23,938.92
4. Step 4: Simplify right side
   31,121.76x = 1,028,632,889.82
5. Step 5: Solve for x
   x = 1,028,632,889.82/31,121.76
6. Step 6: Final answer
   x = 33,051.89