Finding the Fourth Proportional to 2,217.70, 3,061.07 and 1,554.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,217.70 : 3,061.07 = 1,554.72 : x
2. Step 2: Convert to fraction form
   2,217.70/3,061.07 = 1,554.72/x
3. Step 3: Cross multiply
   2,217.70x = 3,061.07 × 1,554.72
4. Step 4: Simplify right side
   2,217.70x = 4,759,106.75
5. Step 5: Solve for x
   x = 4,759,106.75/2,217.70
6. Step 6: Final answer
   x = 2,145.97