Finding the Fourth Proportional to 2,215.84, 3,058.05 and 1,331.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,215.84 : 3,058.05 = 1,331.50 : x
2. Step 2: Convert to fraction form
   2,215.84/3,058.05 = 1,331.50/x
3. Step 3: Cross multiply
   2,215.84x = 3,058.05 × 1,331.50
4. Step 4: Simplify right side
   2,215.84x = 4,071,793.58
5. Step 5: Solve for x
   x = 4,071,793.58/2,215.84
6. Step 6: Final answer
   x = 1,837.58