Finding the Fourth Proportional to 1,931.96, 2,665.28 and 1,145.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,931.96 : 2,665.28 = 1,145.58 : x
2. Step 2: Convert to fraction form
   1,931.96/2,665.28 = 1,145.58/x
3. Step 3: Cross multiply
   1,931.96x = 2,665.28 × 1,145.58
4. Step 4: Simplify right side
   1,931.96x = 3,053,291.46
5. Step 5: Solve for x
   x = 3,053,291.46/1,931.96
6. Step 6: Final answer
   x = 1,580.41