Finding the Fourth Proportional to 31,075.56, 42,884.05 and 16,928.40

Step by Step Solution

1. Step 1: Write the proportion equation
   31,075.56 : 42,884.05 = 16,928.40 : x
2. Step 2: Convert to fraction form
   31,075.56/42,884.05 = 16,928.40/x
3. Step 3: Cross multiply
   31,075.56x = 42,884.05 × 16,928.40
4. Step 4: Simplify right side
   31,075.56x = 725,958,052.96
5. Step 5: Solve for x
   x = 725,958,052.96/31,075.56
6. Step 6: Final answer
   x = 23,361.06