Finding the Fourth Proportional to 2,641.73, 3,962.64 and 999.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,641.73 : 3,962.64 = 999.05 : x
2. Step 2: Convert to fraction form
   2,641.73/3,962.64 = 999.05/x
3. Step 3: Cross multiply
   2,641.73x = 3,962.64 × 999.05
4. Step 4: Simplify right side
   2,641.73x = 3,958,875.49
5. Step 5: Solve for x
   x = 3,958,875.49/2,641.73
6. Step 6: Final answer
   x = 1,498.59