Finding the Fourth Proportional to 2,111.47, 3,167.20 and 551.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.47 : 3,167.20 = 551.47 : x
2. Step 2: Convert to fraction form
   2,111.47/3,167.20 = 551.47/x
3. Step 3: Cross multiply
   2,111.47x = 3,167.20 × 551.47
4. Step 4: Simplify right side
   2,111.47x = 1,746,608.56
5. Step 5: Solve for x
   x = 1,746,608.56/2,111.47
6. Step 6: Final answer
   x = 827.20