Finding the Fourth Proportional to 1,427.21, 1,969.56 and 837.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,427.21 : 1,969.56 = 837.93 : x
2. Step 2: Convert to fraction form
   1,427.21/1,969.56 = 837.93/x
3. Step 3: Cross multiply
   1,427.21x = 1,969.56 × 837.93
4. Step 4: Simplify right side
   1,427.21x = 1,650,353.41
5. Step 5: Solve for x
   x = 1,650,353.41/1,427.21
6. Step 6: Final answer
   x = 1,156.35