Finding the Fourth Proportional to 1,427.73, 1,970.58 and 930.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,427.73 : 1,970.58 = 930.49 : x
2. Step 2: Convert to fraction form
   1,427.73/1,970.58 = 930.49/x
3. Step 3: Cross multiply
   1,427.73x = 1,970.58 × 930.49
4. Step 4: Simplify right side
   1,427.73x = 1,833,598.31
5. Step 5: Solve for x
   x = 1,833,598.31/1,427.73
6. Step 6: Final answer
   x = 1,284.28