Finding the Fourth Proportional to 2,069.75, 3,105.03 and 915.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,069.75 : 3,105.03 = 915.50 : x
2. Step 2: Convert to fraction form
   2,069.75/3,105.03 = 915.50/x
3. Step 3: Cross multiply
   2,069.75x = 3,105.03 × 915.50
4. Step 4: Simplify right side
   2,069.75x = 2,842,654.97
5. Step 5: Solve for x
   x = 2,842,654.97/2,069.75
6. Step 6: Final answer
   x = 1,373.43