Finding the Fourth Proportional to 1,615.88, 2,417.94 and 1,381.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,615.88 : 2,417.94 = 1,381.78 : x
2. Step 2: Convert to fraction form
   1,615.88/2,417.94 = 1,381.78/x
3. Step 3: Cross multiply
   1,615.88x = 2,417.94 × 1,381.78
4. Step 4: Simplify right side
   1,615.88x = 3,341,061.13
5. Step 5: Solve for x
   x = 3,341,061.13/1,615.88
6. Step 6: Final answer
   x = 2,067.64