Finding the Fourth Proportional to 1,667.49, 2,500.65 and 556.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.49 : 2,500.65 = 556.71 : x
2. Step 2: Convert to fraction form
   1,667.49/2,500.65 = 556.71/x
3. Step 3: Cross multiply
   1,667.49x = 2,500.65 × 556.71
4. Step 4: Simplify right side
   1,667.49x = 1,392,136.86
5. Step 5: Solve for x
   x = 1,392,136.86/1,667.49
6. Step 6: Final answer
   x = 834.87