Finding the Fourth Proportional to 1,931.56, 2,665.38 and 1,145.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,931.56 : 2,665.38 = 1,145.50 : x
2. Step 2: Convert to fraction form
   1,931.56/2,665.38 = 1,145.50/x
3. Step 3: Cross multiply
   1,931.56x = 2,665.38 × 1,145.50
4. Step 4: Simplify right side
   1,931.56x = 3,053,192.79
5. Step 5: Solve for x
   x = 3,053,192.79/1,931.56
6. Step 6: Final answer
   x = 1,580.69