Finding the Fourth Proportional to 1,047.76, 1,570.72 and 499.19

Step by Step Solution

1. Step 1: Write the proportion equation
   1,047.76 : 1,570.72 = 499.19 : x
2. Step 2: Convert to fraction form
   1,047.76/1,570.72 = 499.19/x
3. Step 3: Cross multiply
   1,047.76x = 1,570.72 × 499.19
4. Step 4: Simplify right side
   1,047.76x = 784,087.72
5. Step 5: Solve for x
   x = 784,087.72/1,047.76
6. Step 6: Final answer
   x = 748.35