Finding the Fourth Proportional to 2,051.39, 3,075.19 and 818.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,051.39 : 3,075.19 = 818.50 : x
2. Step 2: Convert to fraction form
   2,051.39/3,075.19 = 818.50/x
3. Step 3: Cross multiply
   2,051.39x = 3,075.19 × 818.50
4. Step 4: Simplify right side
   2,051.39x = 2,517,043.02
5. Step 5: Solve for x
   x = 2,517,043.02/2,051.39
6. Step 6: Final answer
   x = 1,226.99