Finding the Fourth Proportional to 31,288.32, 46,949.76 and 12,816

Step by Step Solution

1. Step 1: Write the proportion equation
   31,288.32 : 46,949.76 = 12,816 : x
2. Step 2: Convert to fraction form
   31,288.32/46,949.76 = 12,816/x
3. Step 3: Cross multiply
   31,288.32x = 46,949.76 × 12,816
4. Step 4: Simplify right side
   31,288.32x = 601,708,124.16
5. Step 5: Solve for x
   x = 601,708,124.16/31,288.32
6. Step 6: Final answer
   x = 19,231.08