Finding the Fourth Proportional to 11,820.15, 17,715.15 and 6,276.15

Step by Step Solution

1. Step 1: Write the proportion equation
   11,820.15 : 17,715.15 = 6,276.15 : x
2. Step 2: Convert to fraction form
   11,820.15/17,715.15 = 6,276.15/x
3. Step 3: Cross multiply
   11,820.15x = 17,715.15 × 6,276.15
4. Step 4: Simplify right side
   11,820.15x = 111,182,938.67
5. Step 5: Solve for x
   x = 111,182,938.67/11,820.15
6. Step 6: Final answer
   x = 9,406.22