Finding the Fourth Proportional to 2,151.42, 2,969.01 and 1,207.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,151.42 : 2,969.01 = 1,207.31 : x
2. Step 2: Convert to fraction form
   2,151.42/2,969.01 = 1,207.31/x
3. Step 3: Cross multiply
   2,151.42x = 2,969.01 × 1,207.31
4. Step 4: Simplify right side
   2,151.42x = 3,584,500.62
5. Step 5: Solve for x
   x = 3,584,500.62/2,151.42
6. Step 6: Final answer
   x = 1,666.11