Finding the Fourth Proportional to 1,535.59, 2,119.05 and 906.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,535.59 : 2,119.05 = 906.15 : x
2. Step 2: Convert to fraction form
   1,535.59/2,119.05 = 906.15/x
3. Step 3: Cross multiply
   1,535.59x = 2,119.05 × 906.15
4. Step 4: Simplify right side
   1,535.59x = 1,920,177.16
5. Step 5: Solve for x
   x = 1,920,177.16/1,535.59
6. Step 6: Final answer
   x = 1,250.45