Finding the Fourth Proportional to 1,666.47, 2,499.71 and 570.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,666.47 : 2,499.71 = 570.84 : x
2. Step 2: Convert to fraction form
   1,666.47/2,499.71 = 570.84/x
3. Step 3: Cross multiply
   1,666.47x = 2,499.71 × 570.84
4. Step 4: Simplify right side
   1,666.47x = 1,426,931.60
5. Step 5: Solve for x
   x = 1,426,931.60/1,666.47
6. Step 6: Final answer
   x = 856.26