Finding the Fourth Proportional to 2,784.31, 4,176.51 and 1,323.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,784.31 : 4,176.51 = 1,323.61 : x
2. Step 2: Convert to fraction form
   2,784.31/4,176.51 = 1,323.61/x
3. Step 3: Cross multiply
   2,784.31x = 4,176.51 × 1,323.61
4. Step 4: Simplify right side
   2,784.31x = 5,528,070.40
5. Step 5: Solve for x
   x = 5,528,070.40/2,784.31
6. Step 6: Final answer
   x = 1,985.44