Finding the Fourth Proportional to 1,996.56, 2,993.40 and 900.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,996.56 : 2,993.40 = 900.72 : x
2. Step 2: Convert to fraction form
   1,996.56/2,993.40 = 900.72/x
3. Step 3: Cross multiply
   1,996.56x = 2,993.40 × 900.72
4. Step 4: Simplify right side
   1,996.56x = 2,696,215.25
5. Step 5: Solve for x
   x = 2,696,215.25/1,996.56
6. Step 6: Final answer
   x = 1,350.43