Finding the Fourth Proportional to 11,406.69, 17,111.40 and 4,385.07

Step by Step Solution

1. Step 1: Write the proportion equation
   11,406.69 : 17,111.40 = 4,385.07 : x
2. Step 2: Convert to fraction form
   11,406.69/17,111.40 = 4,385.07/x
3. Step 3: Cross multiply
   11,406.69x = 17,111.40 × 4,385.07
4. Step 4: Simplify right side
   11,406.69x = 75,034,695.02
5. Step 5: Solve for x
   x = 75,034,695.02/11,406.69
6. Step 6: Final answer
   x = 6,578.13