Finding the Fourth Proportional to 1,555.65, 2,145.89 and 995.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,555.65 : 2,145.89 = 995.92 : x
2. Step 2: Convert to fraction form
   1,555.65/2,145.89 = 995.92/x
3. Step 3: Cross multiply
   1,555.65x = 2,145.89 × 995.92
4. Step 4: Simplify right side
   1,555.65x = 2,137,131.89
5. Step 5: Solve for x
   x = 2,137,131.89/1,555.65
6. Step 6: Final answer
   x = 1,373.79