Finding the Fourth Proportional to 2,214.12, 3,322.71 and 915.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,214.12 : 3,322.71 = 915.60 : x
2. Step 2: Convert to fraction form
   2,214.12/3,322.71 = 915.60/x
3. Step 3: Cross multiply
   2,214.12x = 3,322.71 × 915.60
4. Step 4: Simplify right side
   2,214.12x = 3,042,273.28
5. Step 5: Solve for x
   x = 3,042,273.28/2,214.12
6. Step 6: Final answer
   x = 1,374.03