Finding the Fourth Proportional to 1,411.85, 2,116.15 and 761.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,411.85 : 2,116.15 = 761.22 : x
2. Step 2: Convert to fraction form
   1,411.85/2,116.15 = 761.22/x
3. Step 3: Cross multiply
   1,411.85x = 2,116.15 × 761.22
4. Step 4: Simplify right side
   1,411.85x = 1,610,855.70
5. Step 5: Solve for x
   x = 1,610,855.70/1,411.85
6. Step 6: Final answer
   x = 1,140.95