Finding the Fourth Proportional to 10,005.07, 13,806.30 and 5,528.74

Step by Step Solution

1. Step 1: Write the proportion equation
   10,005.07 : 13,806.30 = 5,528.74 : x
2. Step 2: Convert to fraction form
   10,005.07/13,806.30 = 5,528.74/x
3. Step 3: Cross multiply
   10,005.07x = 13,806.30 × 5,528.74
4. Step 4: Simplify right side
   10,005.07x = 76,331,443.06
5. Step 5: Solve for x
   x = 76,331,443.06/10,005.07
6. Step 6: Final answer
   x = 7,629.28