Finding the Fourth Proportional to 12,887.82, 17,793.76 and 9,898.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,887.82 : 17,793.76 = 9,898.31 : x
2. Step 2: Convert to fraction form
   12,887.82/17,793.76 = 9,898.31/x
3. Step 3: Cross multiply
   12,887.82x = 17,793.76 × 9,898.31
4. Step 4: Simplify right side
   12,887.82x = 176,128,152.55
5. Step 5: Solve for x
   x = 176,128,152.55/12,887.82
6. Step 6: Final answer
   x = 13,666.25