Finding the Fourth Proportional to 11,707.02, 17,561.48 and 3,915.86

Step by Step Solution

1. Step 1: Write the proportion equation
   11,707.02 : 17,561.48 = 3,915.86 : x
2. Step 2: Convert to fraction form
   11,707.02/17,561.48 = 3,915.86/x
3. Step 3: Cross multiply
   11,707.02x = 17,561.48 × 3,915.86
4. Step 4: Simplify right side
   11,707.02x = 68,768,189.69
5. Step 5: Solve for x
   x = 68,768,189.69/11,707.02
6. Step 6: Final answer
   x = 5,874.10