Finding the Fourth Proportional to 1,914.36, 2,641.50 and 1,215.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,914.36 : 2,641.50 = 1,215.42 : x
2. Step 2: Convert to fraction form
   1,914.36/2,641.50 = 1,215.42/x
3. Step 3: Cross multiply
   1,914.36x = 2,641.50 × 1,215.42
4. Step 4: Simplify right side
   1,914.36x = 3,210,531.93
5. Step 5: Solve for x
   x = 3,210,531.93/1,914.36
6. Step 6: Final answer
   x = 1,677.08