Finding the Fourth Proportional to 12,961.08, 17,888.82 and 8,429.37

Step by Step Solution

1. Step 1: Write the proportion equation
   12,961.08 : 17,888.82 = 8,429.37 : x
2. Step 2: Convert to fraction form
   12,961.08/17,888.82 = 8,429.37/x
3. Step 3: Cross multiply
   12,961.08x = 17,888.82 × 8,429.37
4. Step 4: Simplify right side
   12,961.08x = 150,791,482.64
5. Step 5: Solve for x
   x = 150,791,482.64/12,961.08
6. Step 6: Final answer
   x = 11,634.18