Finding the Fourth Proportional to 1,795.72, 2,478.06 and 999.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,795.72 : 2,478.06 = 999.05 : x
2. Step 2: Convert to fraction form
   1,795.72/2,478.06 = 999.05/x
3. Step 3: Cross multiply
   1,795.72x = 2,478.06 × 999.05
4. Step 4: Simplify right side
   1,795.72x = 2,475,705.84
5. Step 5: Solve for x
   x = 2,475,705.84/1,795.72
6. Step 6: Final answer
   x = 1,378.67