Finding the Fourth Proportional to 1,086.51, 1,498.64 and 906.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.51 : 1,498.64 = 906.56 : x
2. Step 2: Convert to fraction form
   1,086.51/1,498.64 = 906.56/x
3. Step 3: Cross multiply
   1,086.51x = 1,498.64 × 906.56
4. Step 4: Simplify right side
   1,086.51x = 1,358,595.05
5. Step 5: Solve for x
   x = 1,358,595.05/1,086.51
6. Step 6: Final answer
   x = 1,250.42