Finding the Fourth Proportional to 8,870.64, 12,152.72 and 8,538.27

Step by Step Solution

1. Step 1: Write the proportion equation
   8,870.64 : 12,152.72 = 8,538.27 : x
2. Step 2: Convert to fraction form
   8,870.64/12,152.72 = 8,538.27/x
3. Step 3: Cross multiply
   8,870.64x = 12,152.72 × 8,538.27
4. Step 4: Simplify right side
   8,870.64x = 103,763,204.59
5. Step 5: Solve for x
   x = 103,763,204.59/8,870.64
6. Step 6: Final answer
   x = 11,697.38