Finding the Fourth Proportional to 2,070.48, 2,855.31 and 1,361.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,070.48 : 2,855.31 = 1,361.07 : x
2. Step 2: Convert to fraction form
   2,070.48/2,855.31 = 1,361.07/x
3. Step 3: Cross multiply
   2,070.48x = 2,855.31 × 1,361.07
4. Step 4: Simplify right side
   2,070.48x = 3,886,276.78
5. Step 5: Solve for x
   x = 3,886,276.78/2,070.48
6. Step 6: Final answer
   x = 1,876.99