Finding the Fourth Proportional to 31,075.55, 42,884.20 and 16,928.39

Step by Step Solution

1. Step 1: Write the proportion equation
   31,075.55 : 42,884.20 = 16,928.39 : x
2. Step 2: Convert to fraction form
   31,075.55/42,884.20 = 16,928.39/x
3. Step 3: Cross multiply
   31,075.55x = 42,884.20 × 16,928.39
4. Step 4: Simplify right side
   31,075.55x = 725,960,590.81
5. Step 5: Solve for x
   x = 725,960,590.81/31,075.55
6. Step 6: Final answer
   x = 23,361.15