Finding the Fourth Proportional to 2,151.34, 2,968.98 and 1,207.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,151.34 : 2,968.98 = 1,207.21 : x
2. Step 2: Convert to fraction form
   2,151.34/2,968.98 = 1,207.21/x
3. Step 3: Cross multiply
   2,151.34x = 2,968.98 × 1,207.21
4. Step 4: Simplify right side
   2,151.34x = 3,584,182.35
5. Step 5: Solve for x
   x = 3,584,182.35/2,151.34
6. Step 6: Final answer
   x = 1,666.02