Finding the Fourth Proportional to 1,890.72, 2,832.48 and 1,431.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,890.72 : 2,832.48 = 1,431.52 : x
2. Step 2: Convert to fraction form
   1,890.72/2,832.48 = 1,431.52/x
3. Step 3: Cross multiply
   1,890.72x = 2,832.48 × 1,431.52
4. Step 4: Simplify right side
   1,890.72x = 4,054,751.77
5. Step 5: Solve for x
   x = 4,054,751.77/1,890.72
6. Step 6: Final answer
   x = 2,144.55