Finding the Fourth Proportional to 12,961.25, 17,886.56 and 7,296.09

Step by Step Solution

1. Step 1: Write the proportion equation
   12,961.25 : 17,886.56 = 7,296.09 : x
2. Step 2: Convert to fraction form
   12,961.25/17,886.56 = 7,296.09/x
3. Step 3: Cross multiply
   12,961.25x = 17,886.56 × 7,296.09
4. Step 4: Simplify right side
   12,961.25x = 130,501,902.72
5. Step 5: Solve for x
   x = 130,501,902.72/12,961.25
6. Step 6: Final answer
   x = 10,068.62