Finding the Fourth Proportional to 12,887.76, 19,340.24 and 4,567.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,887.76 : 19,340.24 = 4,567.72 : x
2. Step 2: Convert to fraction form
   12,887.76/19,340.24 = 4,567.72/x
3. Step 3: Cross multiply
   12,887.76x = 19,340.24 × 4,567.72
4. Step 4: Simplify right side
   12,887.76x = 88,340,801.05
5. Step 5: Solve for x
   x = 88,340,801.05/12,887.76
6. Step 6: Final answer
   x = 6,854.63