Finding the Fourth Proportional to 1,451.34, 2,172.15 and 1,191.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,451.34 : 2,172.15 = 1,191.33 : x
2. Step 2: Convert to fraction form
   1,451.34/2,172.15 = 1,191.33/x
3. Step 3: Cross multiply
   1,451.34x = 2,172.15 × 1,191.33
4. Step 4: Simplify right side
   1,451.34x = 2,587,747.46
5. Step 5: Solve for x
   x = 2,587,747.46/1,451.34
6. Step 6: Final answer
   x = 1,783.01