Finding the Fourth Proportional to 11,707.98, 17,562.78 and 3,915.78

Step by Step Solution

1. Step 1: Write the proportion equation
   11,707.98 : 17,562.78 = 3,915.78 : x
2. Step 2: Convert to fraction form
   11,707.98/17,562.78 = 3,915.78/x
3. Step 3: Cross multiply
   11,707.98x = 17,562.78 × 3,915.78
4. Step 4: Simplify right side
   11,707.98x = 68,771,982.67
5. Step 5: Solve for x
   x = 68,771,982.67/11,707.98
6. Step 6: Final answer
   x = 5,873.94