Finding the Fourth Proportional to 1,931.73, 2,665.55 and 1,145.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,931.73 : 2,665.55 = 1,145.63 : x
2. Step 2: Convert to fraction form
   1,931.73/2,665.55 = 1,145.63/x
3. Step 3: Cross multiply
   1,931.73x = 2,665.55 × 1,145.63
4. Step 4: Simplify right side
   1,931.73x = 3,053,714.99
5. Step 5: Solve for x
   x = 3,053,714.99/1,931.73
6. Step 6: Final answer
   x = 1,580.82