Finding the Fourth Proportional to 11,665.68, 17,505.18 and 4,269.12

Step by Step Solution

1. Step 1: Write the proportion equation
   11,665.68 : 17,505.18 = 4,269.12 : x
2. Step 2: Convert to fraction form
   11,665.68/17,505.18 = 4,269.12/x
3. Step 3: Cross multiply
   11,665.68x = 17,505.18 × 4,269.12
4. Step 4: Simplify right side
   11,665.68x = 74,731,714.04
5. Step 5: Solve for x
   x = 74,731,714.04/11,665.68
6. Step 6: Final answer
   x = 6,406.12