Finding the Fourth Proportional to 2,091.21, 2,885.93 and 1,207.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,091.21 : 2,885.93 = 1,207.06 : x
2. Step 2: Convert to fraction form
   2,091.21/2,885.93 = 1,207.06/x
3. Step 3: Cross multiply
   2,091.21x = 2,885.93 × 1,207.06
4. Step 4: Simplify right side
   2,091.21x = 3,483,500.90
5. Step 5: Solve for x
   x = 3,483,500.90/2,091.21
6. Step 6: Final answer
   x = 1,665.78