Finding the Fourth Proportional to 2,534.22, 3,801.78 and 891.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,534.22 : 3,801.78 = 891.72 : x
2. Step 2: Convert to fraction form
   2,534.22/3,801.78 = 891.72/x
3. Step 3: Cross multiply
   2,534.22x = 3,801.78 × 891.72
4. Step 4: Simplify right side
   2,534.22x = 3,390,123.26
5. Step 5: Solve for x
   x = 3,390,123.26/2,534.22
6. Step 6: Final answer
   x = 1,337.74