Finding the Fourth Proportional to 1,415.80, 1,927.61 and 1,411.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,415.80 : 1,927.61 = 1,411.41 : x
2. Step 2: Convert to fraction form
   1,415.80/1,927.61 = 1,411.41/x
3. Step 3: Cross multiply
   1,415.80x = 1,927.61 × 1,411.41
4. Step 4: Simplify right side
   1,415.80x = 2,720,648.03
5. Step 5: Solve for x
   x = 2,720,648.03/1,415.80
6. Step 6: Final answer
   x = 1,921.63