Finding the Fourth Proportional to 1,915.79, 2,642.69 and 1,325.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,915.79 : 2,642.69 = 1,325.30 : x
2. Step 2: Convert to fraction form
   1,915.79/2,642.69 = 1,325.30/x
3. Step 3: Cross multiply
   1,915.79x = 2,642.69 × 1,325.30
4. Step 4: Simplify right side
   1,915.79x = 3,502,347.16
5. Step 5: Solve for x
   x = 3,502,347.16/1,915.79
6. Step 6: Final answer
   x = 1,828.15