Finding the Fourth Proportional to 1,915.20, 2,643.57 and 1,472.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,915.20 : 2,643.57 = 1,472.58 : x
2. Step 2: Convert to fraction form
   1,915.20/2,643.57 = 1,472.58/x
3. Step 3: Cross multiply
   1,915.20x = 2,643.57 × 1,472.58
4. Step 4: Simplify right side
   1,915.20x = 3,892,868.31
5. Step 5: Solve for x
   x = 3,892,868.31/1,915.20
6. Step 6: Final answer
   x = 2,032.62