Finding the Fourth Proportional to 8,911.28, 13,368.72 and 3,068.12

Step by Step Solution

1. Step 1: Write the proportion equation
   8,911.28 : 13,368.72 = 3,068.12 : x
2. Step 2: Convert to fraction form
   8,911.28/13,368.72 = 3,068.12/x
3. Step 3: Cross multiply
   8,911.28x = 13,368.72 × 3,068.12
4. Step 4: Simplify right side
   8,911.28x = 41,016,837.21
5. Step 5: Solve for x
   x = 41,016,837.21/8,911.28
6. Step 6: Final answer
   x = 4,602.80