Finding the Fourth Proportional to 2,963.56, 4,089.72 and 1,915.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,963.56 : 4,089.72 = 1,915.62 : x
2. Step 2: Convert to fraction form
   2,963.56/4,089.72 = 1,915.62/x
3. Step 3: Cross multiply
   2,963.56x = 4,089.72 × 1,915.62
4. Step 4: Simplify right side
   2,963.56x = 7,834,349.43
5. Step 5: Solve for x
   x = 7,834,349.43/2,963.56
6. Step 6: Final answer
   x = 2,643.56