Finding the Fourth Proportional to 2,970.62, 4,117.22 and 2,915.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,970.62 : 4,117.22 = 2,915.30 : x
2. Step 2: Convert to fraction form
   2,970.62/4,117.22 = 2,915.30/x
3. Step 3: Cross multiply
   2,970.62x = 4,117.22 × 2,915.30
4. Step 4: Simplify right side
   2,970.62x = 12,002,931.47
5. Step 5: Solve for x
   x = 12,002,931.47/2,970.62
6. Step 6: Final answer
   x = 4,040.55