Finding the Fourth Proportional to 2,100.80, 2,899.09 and 1,156.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,100.80 : 2,899.09 = 1,156.68 : x
2. Step 2: Convert to fraction form
   2,100.80/2,899.09 = 1,156.68/x
3. Step 3: Cross multiply
   2,100.80x = 2,899.09 × 1,156.68
4. Step 4: Simplify right side
   2,100.80x = 3,353,299.14
5. Step 5: Solve for x
   x = 3,353,299.14/2,100.80
6. Step 6: Final answer
   x = 1,596.20