Finding the Fourth Proportional to 5,131.70, 7,698.35 and 1,667.86

Step by Step Solution

1. Step 1: Write the proportion equation
   5,131.70 : 7,698.35 = 1,667.86 : x
2. Step 2: Convert to fraction form
   5,131.70/7,698.35 = 1,667.86/x
3. Step 3: Cross multiply
   5,131.70x = 7,698.35 × 1,667.86
4. Step 4: Simplify right side
   5,131.70x = 12,839,770.03
5. Step 5: Solve for x
   x = 12,839,770.03/5,131.70
6. Step 6: Final answer
   x = 2,502.05