Finding the Fourth Proportional to 31,012.96, 42,797.68 and 16,865.81

Step by Step Solution

1. Step 1: Write the proportion equation
   31,012.96 : 42,797.68 = 16,865.81 : x
2. Step 2: Convert to fraction form
   31,012.96/42,797.68 = 16,865.81/x
3. Step 3: Cross multiply
   31,012.96x = 42,797.68 × 16,865.81
4. Step 4: Simplify right side
   31,012.96x = 721,817,539.32
5. Step 5: Solve for x
   x = 721,817,539.32/31,012.96
6. Step 6: Final answer
   x = 23,274.71