Finding the Fourth Proportional to 31,037.46, 42,881.88 and 21,647.94

Step by Step Solution

1. Step 1: Write the proportion equation
   31,037.46 : 42,881.88 = 21,647.94 : x
2. Step 2: Convert to fraction form
   31,037.46/42,881.88 = 21,647.94/x
3. Step 3: Cross multiply
   31,037.46x = 42,881.88 × 21,647.94
4. Step 4: Simplify right side
   31,037.46x = 928,304,365.33
5. Step 5: Solve for x
   x = 928,304,365.33/31,037.46
6. Step 6: Final answer
   x = 29,909.16