Finding the Fourth Proportional to 1,015.83, 1,513.63 and 906.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,015.83 : 1,513.63 = 906.78 : x
2. Step 2: Convert to fraction form
   1,015.83/1,513.63 = 906.78/x
3. Step 3: Cross multiply
   1,015.83x = 1,513.63 × 906.78
4. Step 4: Simplify right side
   1,015.83x = 1,372,529.41
5. Step 5: Solve for x
   x = 1,372,529.41/1,015.83
6. Step 6: Final answer
   x = 1,351.14