Finding the Fourth Proportional to 1,666.28, 2,499.82 and 555.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,666.28 : 2,499.82 = 555.69 : x
2. Step 2: Convert to fraction form
   1,666.28/2,499.82 = 555.69/x
3. Step 3: Cross multiply
   1,666.28x = 2,499.82 × 555.69
4. Step 4: Simplify right side
   1,666.28x = 1,389,124.98
5. Step 5: Solve for x
   x = 1,389,124.98/1,666.28
6. Step 6: Final answer
   x = 833.67