Finding the Fourth Proportional to 12,974.17, 17,887.98 and 8,490.82

Step by Step Solution

1. Step 1: Write the proportion equation
   12,974.17 : 17,887.98 = 8,490.82 : x
2. Step 2: Convert to fraction form
   12,974.17/17,887.98 = 8,490.82/x
3. Step 3: Cross multiply
   12,974.17x = 17,887.98 × 8,490.82
4. Step 4: Simplify right side
   12,974.17x = 151,883,618.34
5. Step 5: Solve for x
   x = 151,883,618.34/12,974.17
6. Step 6: Final answer
   x = 11,706.62