Finding the Fourth Proportional to 1,490.16, 2,056.52 and 900.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,490.16 : 2,056.52 = 900.72 : x
2. Step 2: Convert to fraction form
   1,490.16/2,056.52 = 900.72/x
3. Step 3: Cross multiply
   1,490.16x = 2,056.52 × 900.72
4. Step 4: Simplify right side
   1,490.16x = 1,852,348.69
5. Step 5: Solve for x
   x = 1,852,348.69/1,490.16
6. Step 6: Final answer
   x = 1,243.05