Finding the Fourth Proportional to 11,370.48, 17,061.24 and 8,577.54

Step by Step Solution

1. Step 1: Write the proportion equation
   11,370.48 : 17,061.24 = 8,577.54 : x
2. Step 2: Convert to fraction form
   11,370.48/17,061.24 = 8,577.54/x
3. Step 3: Cross multiply
   11,370.48x = 17,061.24 × 8,577.54
4. Step 4: Simplify right side
   11,370.48x = 146,343,468.55
5. Step 5: Solve for x
   x = 146,343,468.55/11,370.48
6. Step 6: Final answer
   x = 12,870.47