Finding the Fourth Proportional to 1,931.38, 2,665.98 and 1,224.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,931.38 : 2,665.98 = 1,224.45 : x
2. Step 2: Convert to fraction form
   1,931.38/2,665.98 = 1,224.45/x
3. Step 3: Cross multiply
   1,931.38x = 2,665.98 × 1,224.45
4. Step 4: Simplify right side
   1,931.38x = 3,264,359.21
5. Step 5: Solve for x
   x = 3,264,359.21/1,931.38
6. Step 6: Final answer
   x = 1,690.17