Finding the Fourth Proportional to 1,490.18, 2,056.59 and 900.70

Step by Step Solution

1. Step 1: Write the proportion equation
   1,490.18 : 2,056.59 = 900.70 : x
2. Step 2: Convert to fraction form
   1,490.18/2,056.59 = 900.70/x
3. Step 3: Cross multiply
   1,490.18x = 2,056.59 × 900.70
4. Step 4: Simplify right side
   1,490.18x = 1,852,377.04
5. Step 5: Solve for x
   x = 1,852,377.04/1,490.18
6. Step 6: Final answer
   x = 1,243.06