Finding the Fourth Proportional to 1,870.58, 2,803.61 and 828.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.58 : 2,803.61 = 828.34 : x
2. Step 2: Convert to fraction form
   1,870.58/2,803.61 = 828.34/x
3. Step 3: Cross multiply
   1,870.58x = 2,803.61 × 828.34
4. Step 4: Simplify right side
   1,870.58x = 2,322,324.15
5. Step 5: Solve for x
   x = 2,322,324.15/1,870.58
6. Step 6: Final answer
   x = 1,241.50