Finding the Fourth Proportional to 31,584.32, 47,366.88 and 13,112

Step by Step Solution

1. Step 1: Write the proportion equation
   31,584.32 : 47,366.88 = 13,112 : x
2. Step 2: Convert to fraction form
   31,584.32/47,366.88 = 13,112/x
3. Step 3: Cross multiply
   31,584.32x = 47,366.88 × 13,112
4. Step 4: Simplify right side
   31,584.32x = 621,074,530.56
5. Step 5: Solve for x
   x = 621,074,530.56/31,584.32
6. Step 6: Final answer
   x = 19,664.01