Finding the Fourth Proportional to 2,146.67, 3,219.57 and 760.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,146.67 : 3,219.57 = 760.05 : x
2. Step 2: Convert to fraction form
   2,146.67/3,219.57 = 760.05/x
3. Step 3: Cross multiply
   2,146.67x = 3,219.57 × 760.05
4. Step 4: Simplify right side
   2,146.67x = 2,447,030.38
5. Step 5: Solve for x
   x = 2,447,030.38/2,146.67
6. Step 6: Final answer
   x = 1,139.92