Finding the Fourth Proportional to 2,055.88, 2,837.70 and 1,172.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,055.88 : 2,837.70 = 1,172.16 : x
2. Step 2: Convert to fraction form
   2,055.88/2,837.70 = 1,172.16/x
3. Step 3: Cross multiply
   2,055.88x = 2,837.70 × 1,172.16
4. Step 4: Simplify right side
   2,055.88x = 3,326,238.43
5. Step 5: Solve for x
   x = 3,326,238.43/2,055.88
6. Step 6: Final answer
   x = 1,617.91