Finding the Fourth Proportional to 2,272.61, 3,407.00 and 886.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,272.61 : 3,407.00 = 886.91 : x
2. Step 2: Convert to fraction form
   2,272.61/3,407.00 = 886.91/x
3. Step 3: Cross multiply
   2,272.61x = 3,407.00 × 886.91
4. Step 4: Simplify right side
   2,272.61x = 3,021,680.90
5. Step 5: Solve for x
   x = 3,021,680.90/2,272.61
6. Step 6: Final answer
   x = 1,329.61