Finding the Fourth Proportional to 2,114.89, 2,918.51 and 1,170.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,114.89 : 2,918.51 = 1,170.63 : x
2. Step 2: Convert to fraction form
   2,114.89/2,918.51 = 1,170.63/x
3. Step 3: Cross multiply
   2,114.89x = 2,918.51 × 1,170.63
4. Step 4: Simplify right side
   2,114.89x = 3,416,500.48
5. Step 5: Solve for x
   x = 3,416,500.48/2,114.89
6. Step 6: Final answer
   x = 1,615.45