Finding the Fourth Proportional to 7,111.22, 10,665.54 and 1,915.88

Step by Step Solution

1. Step 1: Write the proportion equation
   7,111.22 : 10,665.54 = 1,915.88 : x
2. Step 2: Convert to fraction form
   7,111.22/10,665.54 = 1,915.88/x
3. Step 3: Cross multiply
   7,111.22x = 10,665.54 × 1,915.88
4. Step 4: Simplify right side
   7,111.22x = 20,433,841.45
5. Step 5: Solve for x
   x = 20,433,841.45/7,111.22
6. Step 6: Final answer
   x = 2,873.47