Finding the Fourth Proportional to 12,887.85, 17,789.18 and 7,511.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,887.85 : 17,789.18 = 7,511.88 : x
2. Step 2: Convert to fraction form
   12,887.85/17,789.18 = 7,511.88/x
3. Step 3: Cross multiply
   12,887.85x = 17,789.18 × 7,511.88
4. Step 4: Simplify right side
   12,887.85x = 133,630,185.46
5. Step 5: Solve for x
   x = 133,630,185.46/12,887.85
6. Step 6: Final answer
   x = 10,368.69