Finding the Fourth Proportional to 2,091.20, 2,885.88 and 1,207.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,091.20 : 2,885.88 = 1,207.01 : x
2. Step 2: Convert to fraction form
   2,091.20/2,885.88 = 1,207.01/x
3. Step 3: Cross multiply
   2,091.20x = 2,885.88 × 1,207.01
4. Step 4: Simplify right side
   2,091.20x = 3,483,271.59
5. Step 5: Solve for x
   x = 3,483,271.59/2,091.20
6. Step 6: Final answer
   x = 1,665.68