Finding the Fourth Proportional to 1,188.72, 1,782.72 and 322.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,188.72 : 1,782.72 = 322.92 : x
2. Step 2: Convert to fraction form
   1,188.72/1,782.72 = 322.92/x
3. Step 3: Cross multiply
   1,188.72x = 1,782.72 × 322.92
4. Step 4: Simplify right side
   1,188.72x = 575,675.94
5. Step 5: Solve for x
   x = 575,675.94/1,188.72
6. Step 6: Final answer
   x = 484.28