Finding the Fourth Proportional to 1,667.09, 2,499.78 and 571.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.09 : 2,499.78 = 571.16 : x
2. Step 2: Convert to fraction form
   1,667.09/2,499.78 = 571.16/x
3. Step 3: Cross multiply
   1,667.09x = 2,499.78 × 571.16
4. Step 4: Simplify right side
   1,667.09x = 1,427,774.34
5. Step 5: Solve for x
   x = 1,427,774.34/1,667.09
6. Step 6: Final answer
   x = 856.45