Finding the Fourth Proportional to 1,322.50, 1,979.56 and 930.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,322.50 : 1,979.56 = 930.69 : x
2. Step 2: Convert to fraction form
   1,322.50/1,979.56 = 930.69/x
3. Step 3: Cross multiply
   1,322.50x = 1,979.56 × 930.69
4. Step 4: Simplify right side
   1,322.50x = 1,842,346.80
5. Step 5: Solve for x
   x = 1,842,346.80/1,322.50
6. Step 6: Final answer
   x = 1,393.08