Finding the Fourth Proportional to 1,931.12, 2,664.28 and 1,145.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,931.12 : 2,664.28 = 1,145.04 : x
2. Step 2: Convert to fraction form
   1,931.12/2,664.28 = 1,145.04/x
3. Step 3: Cross multiply
   1,931.12x = 2,664.28 × 1,145.04
4. Step 4: Simplify right side
   1,931.12x = 3,050,707.17
5. Step 5: Solve for x
   x = 3,050,707.17/1,931.12
6. Step 6: Final answer
   x = 1,579.76