Finding the Fourth Proportional to 1,095.30, 1,640.61 and 1,019.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,095.30 : 1,640.61 = 1,019.34 : x
2. Step 2: Convert to fraction form
   1,095.30/1,640.61 = 1,019.34/x
3. Step 3: Cross multiply
   1,095.30x = 1,640.61 × 1,019.34
4. Step 4: Simplify right side
   1,095.30x = 1,672,339.40
5. Step 5: Solve for x
   x = 1,672,339.40/1,095.30
6. Step 6: Final answer
   x = 1,526.83