Finding the Fourth Proportional to 2,556.90, 3,836.79 and 1,402.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,556.90 : 3,836.79 = 1,402.50 : x
2. Step 2: Convert to fraction form
   2,556.90/3,836.79 = 1,402.50/x
3. Step 3: Cross multiply
   2,556.90x = 3,836.79 × 1,402.50
4. Step 4: Simplify right side
   2,556.90x = 5,381,097.98
5. Step 5: Solve for x
   x = 5,381,097.98/2,556.90
6. Step 6: Final answer
   x = 2,104.54