Finding the Fourth Proportional to 1,823.31, 2,515.45 and 1,123.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,823.31 : 2,515.45 = 1,123.47 : x
2. Step 2: Convert to fraction form
   1,823.31/2,515.45 = 1,123.47/x
3. Step 3: Cross multiply
   1,823.31x = 2,515.45 × 1,123.47
4. Step 4: Simplify right side
   1,823.31x = 2,826,032.61
5. Step 5: Solve for x
   x = 2,826,032.61/1,823.31
6. Step 6: Final answer
   x = 1,549.95