Finding the Fourth Proportional to 1,666.95, 2,300.43 and 920.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,666.95 : 2,300.43 = 920.89 : x
2. Step 2: Convert to fraction form
   1,666.95/2,300.43 = 920.89/x
3. Step 3: Cross multiply
   1,666.95x = 2,300.43 × 920.89
4. Step 4: Simplify right side
   1,666.95x = 2,118,448.01
5. Step 5: Solve for x
   x = 2,118,448.01/1,666.95
6. Step 6: Final answer
   x = 1,270.85