Finding the Fourth Proportional to 31,075.30, 42,883.70 and 16,928.15

Step by Step Solution

1. Step 1: Write the proportion equation
   31,075.30 : 42,883.70 = 16,928.15 : x
2. Step 2: Convert to fraction form
   31,075.30/42,883.70 = 16,928.15/x
3. Step 3: Cross multiply
   31,075.30x = 42,883.70 × 16,928.15
4. Step 4: Simplify right side
   31,075.30x = 725,941,706.16
5. Step 5: Solve for x
   x = 725,941,706.16/31,075.30
6. Step 6: Final answer
   x = 23,360.73