Finding the Fourth Proportional to 1,643.72, 2,268.06 and 1,054.14

Step by Step Solution

1. Step 1: Write the proportion equation
   1,643.72 : 2,268.06 = 1,054.14 : x
2. Step 2: Convert to fraction form
   1,643.72/2,268.06 = 1,054.14/x
3. Step 3: Cross multiply
   1,643.72x = 2,268.06 × 1,054.14
4. Step 4: Simplify right side
   1,643.72x = 2,390,852.77
5. Step 5: Solve for x
   x = 2,390,852.77/1,643.72
6. Step 6: Final answer
   x = 1,454.54