Finding the Fourth Proportional to 1,666.56, 2,300.82 and 1,107.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,666.56 : 2,300.82 = 1,107.78 : x
2. Step 2: Convert to fraction form
   1,666.56/2,300.82 = 1,107.78/x
3. Step 3: Cross multiply
   1,666.56x = 2,300.82 × 1,107.78
4. Step 4: Simplify right side
   1,666.56x = 2,548,802.38
5. Step 5: Solve for x
   x = 2,548,802.38/1,666.56
6. Step 6: Final answer
   x = 1,529.38