Finding the Fourth Proportional to 1,692.54, 2,540.76 and 999.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,692.54 : 2,540.76 = 999.72 : x
2. Step 2: Convert to fraction form
   1,692.54/2,540.76 = 999.72/x
3. Step 3: Cross multiply
   1,692.54x = 2,540.76 × 999.72
4. Step 4: Simplify right side
   1,692.54x = 2,540,048.59
5. Step 5: Solve for x
   x = 2,540,048.59/1,692.54
6. Step 6: Final answer
   x = 1,500.73