Finding the Fourth Proportional to 31,118.64, 42,944.76 and 16,972.28

Step by Step Solution

1. Step 1: Write the proportion equation
   31,118.64 : 42,944.76 = 16,972.28 : x
2. Step 2: Convert to fraction form
   31,118.64/42,944.76 = 16,972.28/x
3. Step 3: Cross multiply
   31,118.64x = 42,944.76 × 16,972.28
4. Step 4: Simplify right side
   31,118.64x = 728,870,491.25
5. Step 5: Solve for x
   x = 728,870,491.25/31,118.64
6. Step 6: Final answer
   x = 23,422.31