Finding the Fourth Proportional to 31,667.94, 47,484.38 and 12,961.12

Step by Step Solution

1. Step 1: Write the proportion equation
   31,667.94 : 47,484.38 = 12,961.12 : x
2. Step 2: Convert to fraction form
   31,667.94/47,484.38 = 12,961.12/x
3. Step 3: Cross multiply
   31,667.94x = 47,484.38 × 12,961.12
4. Step 4: Simplify right side
   31,667.94x = 615,450,747.31
5. Step 5: Solve for x
   x = 615,450,747.31/31,667.94
6. Step 6: Final answer
   x = 19,434.51