Finding the Fourth Proportional to 2,139.84, 3,211.17 and 753.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,139.84 : 3,211.17 = 753.15 : x
2. Step 2: Convert to fraction form
   2,139.84/3,211.17 = 753.15/x
3. Step 3: Cross multiply
   2,139.84x = 3,211.17 × 753.15
4. Step 4: Simplify right side
   2,139.84x = 2,418,485.96
5. Step 5: Solve for x
   x = 2,418,485.96/2,139.84
6. Step 6: Final answer
   x = 1,130.22