Finding the Fourth Proportional to 1,651.48, 2,478.42 and 1,330.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,651.48 : 2,478.42 = 1,330.72 : x
2. Step 2: Convert to fraction form
   1,651.48/2,478.42 = 1,330.72/x
3. Step 3: Cross multiply
   1,651.48x = 2,478.42 × 1,330.72
4. Step 4: Simplify right side
   1,651.48x = 3,298,083.06
5. Step 5: Solve for x
   x = 3,298,083.06/1,651.48
6. Step 6: Final answer
   x = 1,997.05