Finding the Fourth Proportional to 1,666.71, 2,300.21 and 920.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,666.71 : 2,300.21 = 920.79 : x
2. Step 2: Convert to fraction form
   1,666.71/2,300.21 = 920.79/x
3. Step 3: Cross multiply
   1,666.71x = 2,300.21 × 920.79
4. Step 4: Simplify right side
   1,666.71x = 2,118,005.76
5. Step 5: Solve for x
   x = 2,118,005.76/1,666.71
6. Step 6: Final answer
   x = 1,270.77