Finding the Fourth Proportional to 31,046.46, 42,894.30 and 21,656.94

Step by Step Solution

1. Step 1: Write the proportion equation
   31,046.46 : 42,894.30 = 21,656.94 : x
2. Step 2: Convert to fraction form
   31,046.46/42,894.30 = 21,656.94/x
3. Step 3: Cross multiply
   31,046.46x = 42,894.30 × 21,656.94
4. Step 4: Simplify right side
   31,046.46x = 928,959,281.44
5. Step 5: Solve for x
   x = 928,959,281.44/31,046.46
6. Step 6: Final answer
   x = 29,921.58