Finding the Fourth Proportional to 1,036.35, 1,429.56 and 663.19

Step by Step Solution

1. Step 1: Write the proportion equation
   1,036.35 : 1,429.56 = 663.19 : x
2. Step 2: Convert to fraction form
   1,036.35/1,429.56 = 663.19/x
3. Step 3: Cross multiply
   1,036.35x = 1,429.56 × 663.19
4. Step 4: Simplify right side
   1,036.35x = 948,066.32
5. Step 5: Solve for x
   x = 948,066.32/1,036.35
6. Step 6: Final answer
   x = 914.81