Finding the Fourth Proportional to 1,372.02, 1,892.52 and 979.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,372.02 : 1,892.52 = 979.56 : x
2. Step 2: Convert to fraction form
   1,372.02/1,892.52 = 979.56/x
3. Step 3: Cross multiply
   1,372.02x = 1,892.52 × 979.56
4. Step 4: Simplify right side
   1,372.02x = 1,853,836.89
5. Step 5: Solve for x
   x = 1,853,836.89/1,372.02
6. Step 6: Final answer
   x = 1,351.17