Finding the Fourth Proportional to 2,221.72, 3,333.06 and 760.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,221.72 : 3,333.06 = 760.91 : x
2. Step 2: Convert to fraction form
   2,221.72/3,333.06 = 760.91/x
3. Step 3: Cross multiply
   2,221.72x = 3,333.06 × 760.91
4. Step 4: Simplify right side
   2,221.72x = 2,536,142.02
5. Step 5: Solve for x
   x = 2,536,142.02/2,221.72
6. Step 6: Final answer
   x = 1,141.52