Finding the Fourth Proportional to 1,066.32, 1,472.88 and 786.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,066.32 : 1,472.88 = 786.96 : x
2. Step 2: Convert to fraction form
   1,066.32/1,472.88 = 786.96/x
3. Step 3: Cross multiply
   1,066.32x = 1,472.88 × 786.96
4. Step 4: Simplify right side
   1,066.32x = 1,159,097.64
5. Step 5: Solve for x
   x = 1,159,097.64/1,066.32
6. Step 6: Final answer
   x = 1,087.01