Finding the Fourth Proportional to 11,670.32, 17,490.78 and 8,333.31

Step by Step Solution

1. Step 1: Write the proportion equation
   11,670.32 : 17,490.78 = 8,333.31 : x
2. Step 2: Convert to fraction form
   11,670.32/17,490.78 = 8,333.31/x
3. Step 3: Cross multiply
   11,670.32x = 17,490.78 × 8,333.31
4. Step 4: Simplify right side
   11,670.32x = 145,756,091.88
5. Step 5: Solve for x
   x = 145,756,091.88/11,670.32
6. Step 6: Final answer
   x = 12,489.47