Finding the Fourth Proportional to 1,665.99, 2,499.29 and 692.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.99 : 2,499.29 = 692.17 : x
2. Step 2: Convert to fraction form
   1,665.99/2,499.29 = 692.17/x
3. Step 3: Cross multiply
   1,665.99x = 2,499.29 × 692.17
4. Step 4: Simplify right side
   1,665.99x = 1,729,929.04
5. Step 5: Solve for x
   x = 1,729,929.04/1,665.99
6. Step 6: Final answer
   x = 1,038.38