Finding the Fourth Proportional to 1,666.57, 2,299.98 and 920.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,666.57 : 2,299.98 = 920.59 : x
2. Step 2: Convert to fraction form
   1,666.57/2,299.98 = 920.59/x
3. Step 3: Cross multiply
   1,666.57x = 2,299.98 × 920.59
4. Step 4: Simplify right side
   1,666.57x = 2,117,338.59
5. Step 5: Solve for x
   x = 2,117,338.59/1,666.57
6. Step 6: Final answer
   x = 1,270.48