Finding the Fourth Proportional to 1,666.60, 2,502.86 and 1,581.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,666.60 : 2,502.86 = 1,581.52 : x
2. Step 2: Convert to fraction form
   1,666.60/2,502.86 = 1,581.52/x
3. Step 3: Cross multiply
   1,666.60x = 2,502.86 × 1,581.52
4. Step 4: Simplify right side
   1,666.60x = 3,958,323.15
5. Step 5: Solve for x
   x = 3,958,323.15/1,666.60
6. Step 6: Final answer
   x = 2,375.09