Finding the Fourth Proportional to 1,555.10, 2,329.59 and 822.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,555.10 : 2,329.59 = 822.86 : x
2. Step 2: Convert to fraction form
   1,555.10/2,329.59 = 822.86/x
3. Step 3: Cross multiply
   1,555.10x = 2,329.59 × 822.86
4. Step 4: Simplify right side
   1,555.10x = 1,916,926.43
5. Step 5: Solve for x
   x = 1,916,926.43/1,555.10
6. Step 6: Final answer
   x = 1,232.67