Finding the Fourth Proportional to 1,667.12, 2,499.19 and 692.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.12 : 2,499.19 = 692.60 : x
2. Step 2: Convert to fraction form
   1,667.12/2,499.19 = 692.60/x
3. Step 3: Cross multiply
   1,667.12x = 2,499.19 × 692.60
4. Step 4: Simplify right side
   1,667.12x = 1,730,938.99
5. Step 5: Solve for x
   x = 1,730,938.99/1,667.12
6. Step 6: Final answer
   x = 1,038.28