Finding the Fourth Proportional to 2,147.98, 3,217.70 and 1,415.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,147.98 : 3,217.70 = 1,415.34 : x
2. Step 2: Convert to fraction form
   2,147.98/3,217.70 = 1,415.34/x
3. Step 3: Cross multiply
   2,147.98x = 3,217.70 × 1,415.34
4. Step 4: Simplify right side
   2,147.98x = 4,554,123.43
5. Step 5: Solve for x
   x = 4,554,123.43/2,147.98
6. Step 6: Final answer
   x = 2,120.19