Finding the Fourth Proportional to 1,530.46, 2,111.27 and 999.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,530.46 : 2,111.27 = 999.09 : x
2. Step 2: Convert to fraction form
   1,530.46/2,111.27 = 999.09/x
3. Step 3: Cross multiply
   1,530.46x = 2,111.27 × 999.09
4. Step 4: Simplify right side
   1,530.46x = 2,109,348.74
5. Step 5: Solve for x
   x = 2,109,348.74/1,530.46
6. Step 6: Final answer
   x = 1,378.25