Finding the Fourth Proportional to 1,666.94, 2,499.71 and 571.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,666.94 : 2,499.71 = 571.39 : x
2. Step 2: Convert to fraction form
   1,666.94/2,499.71 = 571.39/x
3. Step 3: Cross multiply
   1,666.94x = 2,499.71 × 571.39
4. Step 4: Simplify right side
   1,666.94x = 1,428,300.19
5. Step 5: Solve for x
   x = 1,428,300.19/1,666.94
6. Step 6: Final answer
   x = 856.84