Finding the Fourth Proportional to 12,683.63, 17,499.91 and 7,904.34

Step by Step Solution

1. Step 1: Write the proportion equation
   12,683.63 : 17,499.91 = 7,904.34 : x
2. Step 2: Convert to fraction form
   12,683.63/17,499.91 = 7,904.34/x
3. Step 3: Cross multiply
   12,683.63x = 17,499.91 × 7,904.34
4. Step 4: Simplify right side
   12,683.63x = 138,325,218.85
5. Step 5: Solve for x
   x = 138,325,218.85/12,683.63
6. Step 6: Final answer
   x = 10,905.81