Finding the Fourth Proportional to 2,538.82, 3,808.83 and 807.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,538.82 : 3,808.83 = 807.45 : x
2. Step 2: Convert to fraction form
   2,538.82/3,808.83 = 807.45/x
3. Step 3: Cross multiply
   2,538.82x = 3,808.83 × 807.45
4. Step 4: Simplify right side
   2,538.82x = 3,075,439.78
5. Step 5: Solve for x
   x = 3,075,439.78/2,538.82
6. Step 6: Final answer
   x = 1,211.37