Finding the Fourth Proportional to 1,475.86, 2,212.60 and 817.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,475.86 : 2,212.60 = 817.72 : x
2. Step 2: Convert to fraction form
   1,475.86/2,212.60 = 817.72/x
3. Step 3: Cross multiply
   1,475.86x = 2,212.60 × 817.72
4. Step 4: Simplify right side
   1,475.86x = 1,809,287.27
5. Step 5: Solve for x
   x = 1,809,287.27/1,475.86
6. Step 6: Final answer
   x = 1,225.92