Finding the Fourth Proportional to 13,422.78, 18,522.82 and 7,454.84

Step by Step Solution

1. Step 1: Write the proportion equation
   13,422.78 : 18,522.82 = 7,454.84 : x
2. Step 2: Convert to fraction form
   13,422.78/18,522.82 = 7,454.84/x
3. Step 3: Cross multiply
   13,422.78x = 18,522.82 × 7,454.84
4. Step 4: Simplify right side
   13,422.78x = 138,084,659.45
5. Step 5: Solve for x
   x = 138,084,659.45/13,422.78
6. Step 6: Final answer
   x = 10,287.34