Finding the Fourth Proportional to 12,402.28, 17,118.06 and 7,100.14

Step by Step Solution

1. Step 1: Write the proportion equation
   12,402.28 : 17,118.06 = 7,100.14 : x
2. Step 2: Convert to fraction form
   12,402.28/17,118.06 = 7,100.14/x
3. Step 3: Cross multiply
   12,402.28x = 17,118.06 × 7,100.14
4. Step 4: Simplify right side
   12,402.28x = 121,540,622.53
5. Step 5: Solve for x
   x = 121,540,622.53/12,402.28
6. Step 6: Final answer
   x = 9,799.86