Finding the Fourth Proportional to 2,172.67, 3,256.56 and 1,077.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,172.67 : 3,256.56 = 1,077.82 : x
2. Step 2: Convert to fraction form
   2,172.67/3,256.56 = 1,077.82/x
3. Step 3: Cross multiply
   2,172.67x = 3,256.56 × 1,077.82
4. Step 4: Simplify right side
   2,172.67x = 3,509,985.50
5. Step 5: Solve for x
   x = 3,509,985.50/2,172.67
6. Step 6: Final answer
   x = 1,615.52