Finding the Fourth Proportional to 1,560.62, 2,152.70 and 930.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,560.62 : 2,152.70 = 930.72 : x
2. Step 2: Convert to fraction form
   1,560.62/2,152.70 = 930.72/x
3. Step 3: Cross multiply
   1,560.62x = 2,152.70 × 930.72
4. Step 4: Simplify right side
   1,560.62x = 2,003,563.27
5. Step 5: Solve for x
   x = 2,003,563.27/1,560.62
6. Step 6: Final answer
   x = 1,283.83