Finding the Fourth Proportional to 1,564.56, 2,344.32 and 915.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,564.56 : 2,344.32 = 915.84 : x
2. Step 2: Convert to fraction form
   1,564.56/2,344.32 = 915.84/x
3. Step 3: Cross multiply
   1,564.56x = 2,344.32 × 915.84
4. Step 4: Simplify right side
   1,564.56x = 2,147,022.03
5. Step 5: Solve for x
   x = 2,147,022.03/1,564.56
6. Step 6: Final answer
   x = 1,372.28