Finding the Fourth Proportional to 1,427.22, 1,968.57 and 930.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,427.22 : 1,968.57 = 930.15 : x
2. Step 2: Convert to fraction form
   1,427.22/1,968.57 = 930.15/x
3. Step 3: Cross multiply
   1,427.22x = 1,968.57 × 930.15
4. Step 4: Simplify right side
   1,427.22x = 1,831,065.39
5. Step 5: Solve for x
   x = 1,831,065.39/1,427.22
6. Step 6: Final answer
   x = 1,282.96