Finding the Fourth Proportional to 1,061.64, 1,591.27 and 499.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.64 : 1,591.27 = 499.05 : x
2. Step 2: Convert to fraction form
   1,061.64/1,591.27 = 499.05/x
3. Step 3: Cross multiply
   1,061.64x = 1,591.27 × 499.05
4. Step 4: Simplify right side
   1,061.64x = 794,130.82
5. Step 5: Solve for x
   x = 794,130.82/1,061.64
6. Step 6: Final answer
   x = 748.02