Finding the Fourth Proportional to 2,055.51, 2,835.91 and 1,215.95

Step by Step Solution

1. Step 1: Write the proportion equation
   2,055.51 : 2,835.91 = 1,215.95 : x
2. Step 2: Convert to fraction form
   2,055.51/2,835.91 = 1,215.95/x
3. Step 3: Cross multiply
   2,055.51x = 2,835.91 × 1,215.95
4. Step 4: Simplify right side
   2,055.51x = 3,448,312.10
5. Step 5: Solve for x
   x = 3,448,312.10/2,055.51
6. Step 6: Final answer
   x = 1,677.59