Finding the Fourth Proportional to 1,666.35, 2,300.43 and 1,077.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,666.35 : 2,300.43 = 1,077.21 : x
2. Step 2: Convert to fraction form
   1,666.35/2,300.43 = 1,077.21/x
3. Step 3: Cross multiply
   1,666.35x = 2,300.43 × 1,077.21
4. Step 4: Simplify right side
   1,666.35x = 2,478,046.20
5. Step 5: Solve for x
   x = 2,478,046.20/1,666.35
6. Step 6: Final answer
   x = 1,487.11