Finding the Fourth Proportional to 1,821.31, 2,730.34 and 846.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,821.31 : 2,730.34 = 846.88 : x
2. Step 2: Convert to fraction form
   1,821.31/2,730.34 = 846.88/x
3. Step 3: Cross multiply
   1,821.31x = 2,730.34 × 846.88
4. Step 4: Simplify right side
   1,821.31x = 2,312,264.57
5. Step 5: Solve for x
   x = 2,312,264.57/1,821.31
6. Step 6: Final answer
   x = 1,269.56