Finding the Fourth Proportional to 1,419.45, 2,126.79 and 900.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,419.45 : 2,126.79 = 900.05 : x
2. Step 2: Convert to fraction form
   1,419.45/2,126.79 = 900.05/x
3. Step 3: Cross multiply
   1,419.45x = 2,126.79 × 900.05
4. Step 4: Simplify right side
   1,419.45x = 1,914,206.71
5. Step 5: Solve for x
   x = 1,914,206.71/1,419.45
6. Step 6: Final answer
   x = 1,348.56