Finding the Fourth Proportional to 12,887.31, 17,784.92 and 12,296.82

Step by Step Solution

1. Step 1: Write the proportion equation
   12,887.31 : 17,784.92 = 12,296.82 : x
2. Step 2: Convert to fraction form
   12,887.31/17,784.92 = 12,296.82/x
3. Step 3: Cross multiply
   12,887.31x = 17,784.92 × 12,296.82
4. Step 4: Simplify right side
   12,887.31x = 218,697,959.95
5. Step 5: Solve for x
   x = 218,697,959.95/12,887.31
6. Step 6: Final answer
   x = 16,970.02