Finding the Fourth Proportional to 1,931.08, 2,664.48 and 1,145.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,931.08 : 2,664.48 = 1,145.38 : x
2. Step 2: Convert to fraction form
   1,931.08/2,664.48 = 1,145.38/x
3. Step 3: Cross multiply
   1,931.08x = 2,664.48 × 1,145.38
4. Step 4: Simplify right side
   1,931.08x = 3,051,842.10
5. Step 5: Solve for x
   x = 3,051,842.10/1,931.08
6. Step 6: Final answer
   x = 1,580.38