Finding the Fourth Proportional to 3,557.09, 5,334.69 and 1,091.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,557.09 : 5,334.69 = 1,091.72 : x
2. Step 2: Convert to fraction form
   3,557.09/5,334.69 = 1,091.72/x
3. Step 3: Cross multiply
   3,557.09x = 5,334.69 × 1,091.72
4. Step 4: Simplify right side
   3,557.09x = 5,823,987.77
5. Step 5: Solve for x
   x = 5,823,987.77/3,557.09
6. Step 6: Final answer
   x = 1,637.29