Finding the Fourth Proportional to 1,095.89, 1,643.51 and 402.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,095.89 : 1,643.51 = 402.53 : x
2. Step 2: Convert to fraction form
   1,095.89/1,643.51 = 402.53/x
3. Step 3: Cross multiply
   1,095.89x = 1,643.51 × 402.53
4. Step 4: Simplify right side
   1,095.89x = 661,551.85
5. Step 5: Solve for x
   x = 661,551.85/1,095.89
6. Step 6: Final answer
   x = 603.67