Finding the Fourth Proportional to 1,095.56, 1,642.78 and 436.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,095.56 : 1,642.78 = 436.84 : x
2. Step 2: Convert to fraction form
   1,095.56/1,642.78 = 436.84/x
3. Step 3: Cross multiply
   1,095.56x = 1,642.78 × 436.84
4. Step 4: Simplify right side
   1,095.56x = 717,632.02
5. Step 5: Solve for x
   x = 717,632.02/1,095.56
6. Step 6: Final answer
   x = 655.04