Finding the Fourth Proportional to 2,020.88, 2,788.62 and 1,235.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,020.88 : 2,788.62 = 1,235.72 : x
2. Step 2: Convert to fraction form
   2,020.88/2,788.62 = 1,235.72/x
3. Step 3: Cross multiply
   2,020.88x = 2,788.62 × 1,235.72
4. Step 4: Simplify right side
   2,020.88x = 3,445,953.51
5. Step 5: Solve for x
   x = 3,445,953.51/2,020.88
6. Step 6: Final answer
   x = 1,705.17