Finding the Fourth Proportional to 31,129, 42,958.02 and 19,951

Step by Step Solution

1. Step 1: Write the proportion equation
   31,129 : 42,958.02 = 19,951 : x
2. Step 2: Convert to fraction form
   31,129/42,958.02 = 19,951/x
3. Step 3: Cross multiply
   31,129x = 42,958.02 × 19,951
4. Step 4: Simplify right side
   31,129x = 857,055,457.02
5. Step 5: Solve for x
   x = 857,055,457.02/31,129
6. Step 6: Final answer
   x = 27,532.38