Finding the Fourth Proportional to 10,145.05, 13,999.55 and 5,669.15

Step by Step Solution

1. Step 1: Write the proportion equation
   10,145.05 : 13,999.55 = 5,669.15 : x
2. Step 2: Convert to fraction form
   10,145.05/13,999.55 = 5,669.15/x
3. Step 3: Cross multiply
   10,145.05x = 13,999.55 × 5,669.15
4. Step 4: Simplify right side
   10,145.05x = 79,365,482.43
5. Step 5: Solve for x
   x = 79,365,482.43/10,145.05
6. Step 6: Final answer
   x = 7,823.07