Finding the Fourth Proportional to 1,050.56, 1,574.56 and 615.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,050.56 : 1,574.56 = 615.60 : x
2. Step 2: Convert to fraction form
   1,050.56/1,574.56 = 615.60/x
3. Step 3: Cross multiply
   1,050.56x = 1,574.56 × 615.60
4. Step 4: Simplify right side
   1,050.56x = 969,299.14
5. Step 5: Solve for x
   x = 969,299.14/1,050.56
6. Step 6: Final answer
   x = 922.65