Finding the Fourth Proportional to 1,050.86, 1,449.61 and 657.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,050.86 : 1,449.61 = 657.20 : x
2. Step 2: Convert to fraction form
   1,050.86/1,449.61 = 657.20/x
3. Step 3: Cross multiply
   1,050.86x = 1,449.61 × 657.20
4. Step 4: Simplify right side
   1,050.86x = 952,685.67
5. Step 5: Solve for x
   x = 952,685.67/1,050.86
6. Step 6: Final answer
   x = 906.58