Finding the Fourth Proportional to 1,627.34, 2,442.20 and 1,215.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,627.34 : 2,442.20 = 1,215.22 : x
2. Step 2: Convert to fraction form
   1,627.34/2,442.20 = 1,215.22/x
3. Step 3: Cross multiply
   1,627.34x = 2,442.20 × 1,215.22
4. Step 4: Simplify right side
   1,627.34x = 2,967,809.52
5. Step 5: Solve for x
   x = 2,967,809.52/1,627.34
6. Step 6: Final answer
   x = 1,823.72