Finding the Fourth Proportional to 1,886.30, 2,828.55 and 846.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,886.30 : 2,828.55 = 846.31 : x
2. Step 2: Convert to fraction form
   1,886.30/2,828.55 = 846.31/x
3. Step 3: Cross multiply
   1,886.30x = 2,828.55 × 846.31
4. Step 4: Simplify right side
   1,886.30x = 2,393,830.15
5. Step 5: Solve for x
   x = 2,393,830.15/1,886.30
6. Step 6: Final answer
   x = 1,269.06