Finding the Fourth Proportional to 3,515.61, 5,270.16 and 1,667.59

Step by Step Solution

1. Step 1: Write the proportion equation
   3,515.61 : 5,270.16 = 1,667.59 : x
2. Step 2: Convert to fraction form
   3,515.61/5,270.16 = 1,667.59/x
3. Step 3: Cross multiply
   3,515.61x = 5,270.16 × 1,667.59
4. Step 4: Simplify right side
   3,515.61x = 8,788,457.78
5. Step 5: Solve for x
   x = 8,788,457.78/3,515.61
6. Step 6: Final answer
   x = 2,499.84