Finding the Fourth Proportional to 1,559.58, 2,151.88 and 930.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,559.58 : 2,151.88 = 930.34 : x
2. Step 2: Convert to fraction form
   1,559.58/2,151.88 = 930.34/x
3. Step 3: Cross multiply
   1,559.58x = 2,151.88 × 930.34
4. Step 4: Simplify right side
   1,559.58x = 2,001,980.04
5. Step 5: Solve for x
   x = 2,001,980.04/1,559.58
6. Step 6: Final answer
   x = 1,283.67