Finding the Fourth Proportional to 31,016.34, 42,784.32 and 19,512.96

Step by Step Solution

1. Step 1: Write the proportion equation
   31,016.34 : 42,784.32 = 19,512.96 : x
2. Step 2: Convert to fraction form
   31,016.34/42,784.32 = 19,512.96/x
3. Step 3: Cross multiply
   31,016.34x = 42,784.32 × 19,512.96
4. Step 4: Simplify right side
   31,016.34x = 834,848,724.79
5. Step 5: Solve for x
   x = 834,848,724.79/31,016.34
6. Step 6: Final answer
   x = 26,916.42