Finding the Fourth Proportional to 2,415.90, 3,623.31 and 1,116.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,415.90 : 3,623.31 = 1,116.12 : x
2. Step 2: Convert to fraction form
   2,415.90/3,623.31 = 1,116.12/x
3. Step 3: Cross multiply
   2,415.90x = 3,623.31 × 1,116.12
4. Step 4: Simplify right side
   2,415.90x = 4,044,048.76
5. Step 5: Solve for x
   x = 4,044,048.76/2,415.90
6. Step 6: Final answer
   x = 1,673.93