Finding the Fourth Proportional to 1,665.69, 2,298.60 and 919.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.69 : 2,298.60 = 919.71 : x
2. Step 2: Convert to fraction form
   1,665.69/2,298.60 = 919.71/x
3. Step 3: Cross multiply
   1,665.69x = 2,298.60 × 919.71
4. Step 4: Simplify right side
   1,665.69x = 2,114,045.41
5. Step 5: Solve for x
   x = 2,114,045.41/1,665.69
6. Step 6: Final answer
   x = 1,269.17