Finding the Fourth Proportional to 2,221.62, 3,333.00 and 760.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,221.62 : 3,333.00 = 760.78 : x
2. Step 2: Convert to fraction form
   2,221.62/3,333.00 = 760.78/x
3. Step 3: Cross multiply
   2,221.62x = 3,333.00 × 760.78
4. Step 4: Simplify right side
   2,221.62x = 2,535,659.27
5. Step 5: Solve for x
   x = 2,535,659.27/2,221.62
6. Step 6: Final answer
   x = 1,141.36