Finding the Fourth Proportional to 31,075.80, 42,884.76 and 19,136.16

Step by Step Solution

1. Step 1: Write the proportion equation
   31,075.80 : 42,884.76 = 19,136.16 : x
2. Step 2: Convert to fraction form
   31,075.80/42,884.76 = 19,136.16/x
3. Step 3: Cross multiply
   31,075.80x = 42,884.76 × 19,136.16
4. Step 4: Simplify right side
   31,075.80x = 820,649,628.92
5. Step 5: Solve for x
   x = 820,649,628.92/31,075.80
6. Step 6: Final answer
   x = 26,408.00