Finding the Fourth Proportional to 9,111.78, 12,574.44 and 5,526.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,111.78 : 12,574.44 = 5,526.72 : x
2. Step 2: Convert to fraction form
   9,111.78/12,574.44 = 5,526.72/x
3. Step 3: Cross multiply
   9,111.78x = 12,574.44 × 5,526.72
4. Step 4: Simplify right side
   9,111.78x = 69,495,409.04
5. Step 5: Solve for x
   x = 69,495,409.04/9,111.78
6. Step 6: Final answer
   x = 7,626.98