Finding the Fourth Proportional to 31,033.46, 42,876.34 and 21,643.94

Step by Step Solution

1. Step 1: Write the proportion equation
   31,033.46 : 42,876.34 = 21,643.94 : x
2. Step 2: Convert to fraction form
   31,033.46/42,876.34 = 21,643.94/x
3. Step 3: Cross multiply
   31,033.46x = 42,876.34 × 21,643.94
4. Step 4: Simplify right side
   31,033.46x = 928,012,930.38
5. Step 5: Solve for x
   x = 928,012,930.38/31,033.46
6. Step 6: Final answer
   x = 29,903.62