Finding the Fourth Proportional to 12,438.09, 17,166.74 and 7,402.59

Step by Step Solution

1. Step 1: Write the proportion equation
   12,438.09 : 17,166.74 = 7,402.59 : x
2. Step 2: Convert to fraction form
   12,438.09/17,166.74 = 7,402.59/x
3. Step 3: Cross multiply
   12,438.09x = 17,166.74 × 7,402.59
4. Step 4: Simplify right side
   12,438.09x = 127,078,300.84
5. Step 5: Solve for x
   x = 127,078,300.84/12,438.09
6. Step 6: Final answer
   x = 10,216.87