Finding the Fourth Proportional to 2,946.89, 4,420.61 and 866.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,946.89 : 4,420.61 = 866.89 : x
2. Step 2: Convert to fraction form
   2,946.89/4,420.61 = 866.89/x
3. Step 3: Cross multiply
   2,946.89x = 4,420.61 × 866.89
4. Step 4: Simplify right side
   2,946.89x = 3,832,167.22
5. Step 5: Solve for x
   x = 3,832,167.22/2,946.89
6. Step 6: Final answer
   x = 1,300.41