Finding the Fourth Proportional to 2,445.55, 3,667.87 and 690.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,445.55 : 3,667.87 = 690.12 : x
2. Step 2: Convert to fraction form
   2,445.55/3,667.87 = 690.12/x
3. Step 3: Cross multiply
   2,445.55x = 3,667.87 × 690.12
4. Step 4: Simplify right side
   2,445.55x = 2,531,268.72
5. Step 5: Solve for x
   x = 2,531,268.72/2,445.55
6. Step 6: Final answer
   x = 1,035.05