Finding the Fourth Proportional to 1,480.72, 2,218.64 and 1,091.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,480.72 : 2,218.64 = 1,091.51 : x
2. Step 2: Convert to fraction form
   1,480.72/2,218.64 = 1,091.51/x
3. Step 3: Cross multiply
   1,480.72x = 2,218.64 × 1,091.51
4. Step 4: Simplify right side
   1,480.72x = 2,421,667.75
5. Step 5: Solve for x
   x = 2,421,667.75/1,480.72
6. Step 6: Final answer
   x = 1,635.47