Finding the Fourth Proportional to 31,052.61, 42,852.78 and 16,905.42

Step by Step Solution

1. Step 1: Write the proportion equation
   31,052.61 : 42,852.78 = 16,905.42 : x
2. Step 2: Convert to fraction form
   31,052.61/42,852.78 = 16,905.42/x
3. Step 3: Cross multiply
   31,052.61x = 42,852.78 × 16,905.42
4. Step 4: Simplify right side
   31,052.61x = 724,444,244.07
5. Step 5: Solve for x
   x = 724,444,244.07/31,052.61
6. Step 6: Final answer
   x = 23,329.58