Finding the Fourth Proportional to 2,172.69, 3,261.60 and 1,554.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,172.69 : 3,261.60 = 1,554.75 : x
2. Step 2: Convert to fraction form
   2,172.69/3,261.60 = 1,554.75/x
3. Step 3: Cross multiply
   2,172.69x = 3,261.60 × 1,554.75
4. Step 4: Simplify right side
   2,172.69x = 5,070,972.60
5. Step 5: Solve for x
   x = 5,070,972.60/2,172.69
6. Step 6: Final answer
   x = 2,333.96