Finding the Fourth Proportional to 2,091.93, 2,886.53 and 1,207.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,091.93 : 2,886.53 = 1,207.61 : x
2. Step 2: Convert to fraction form
   2,091.93/2,886.53 = 1,207.61/x
3. Step 3: Cross multiply
   2,091.93x = 2,886.53 × 1,207.61
4. Step 4: Simplify right side
   2,091.93x = 3,485,782.02
5. Step 5: Solve for x
   x = 3,485,782.02/2,091.93
6. Step 6: Final answer
   x = 1,666.30