Finding the Fourth Proportional to 1,887.28, 2,830.72 and 1,155.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,887.28 : 2,830.72 = 1,155.58 : x
2. Step 2: Convert to fraction form
   1,887.28/2,830.72 = 1,155.58/x
3. Step 3: Cross multiply
   1,887.28x = 2,830.72 × 1,155.58
4. Step 4: Simplify right side
   1,887.28x = 3,271,123.42
5. Step 5: Solve for x
   x = 3,271,123.42/1,887.28
6. Step 6: Final answer
   x = 1,733.25