Finding the Fourth Proportional to 2,221.47, 3,064.57 and 1,381.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,221.47 : 3,064.57 = 1,381.91 : x
2. Step 2: Convert to fraction form
   2,221.47/3,064.57 = 1,381.91/x
3. Step 3: Cross multiply
   2,221.47x = 3,064.57 × 1,381.91
4. Step 4: Simplify right side
   2,221.47x = 4,234,941.15
5. Step 5: Solve for x
   x = 4,234,941.15/2,221.47
6. Step 6: Final answer
   x = 1,906.37