Finding the Fourth Proportional to 1,200.32, 1,656.56 and 808.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,200.32 : 1,656.56 = 808.16 : x
2. Step 2: Convert to fraction form
   1,200.32/1,656.56 = 808.16/x
3. Step 3: Cross multiply
   1,200.32x = 1,656.56 × 808.16
4. Step 4: Simplify right side
   1,200.32x = 1,338,765.53
5. Step 5: Solve for x
   x = 1,338,765.53/1,200.32
6. Step 6: Final answer
   x = 1,115.34