Finding the Fourth Proportional to 2,669.07, 4,003.59 and 915.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,669.07 : 4,003.59 = 915.30 : x
2. Step 2: Convert to fraction form
   2,669.07/4,003.59 = 915.30/x
3. Step 3: Cross multiply
   2,669.07x = 4,003.59 × 915.30
4. Step 4: Simplify right side
   2,669.07x = 3,664,485.93
5. Step 5: Solve for x
   x = 3,664,485.93/2,669.07
6. Step 6: Final answer
   x = 1,372.94