Finding the Fourth Proportional to 8,929.32, 13,377.82 and 8,402.28

Step by Step Solution

1. Step 1: Write the proportion equation
   8,929.32 : 13,377.82 = 8,402.28 : x
2. Step 2: Convert to fraction form
   8,929.32/13,377.82 = 8,402.28/x
3. Step 3: Cross multiply
   8,929.32x = 13,377.82 × 8,402.28
4. Step 4: Simplify right side
   8,929.32x = 112,404,189.43
5. Step 5: Solve for x
   x = 112,404,189.43/8,929.32
6. Step 6: Final answer
   x = 12,588.21