Finding the Fourth Proportional to 8,435.59, 11,642.18 and 5,080.21

Step by Step Solution

1. Step 1: Write the proportion equation
   8,435.59 : 11,642.18 = 5,080.21 : x
2. Step 2: Convert to fraction form
   8,435.59/11,642.18 = 5,080.21/x
3. Step 3: Cross multiply
   8,435.59x = 11,642.18 × 5,080.21
4. Step 4: Simplify right side
   8,435.59x = 59,144,664.75
5. Step 5: Solve for x
   x = 59,144,664.75/8,435.59
6. Step 6: Final answer
   x = 7,011.33