Finding the Fourth Proportional to 42,431.07, 63,648.63 and 13,969.83

Step by Step Solution

1. Step 1: Write the proportion equation
   42,431.07 : 63,648.63 = 13,969.83 : x
2. Step 2: Convert to fraction form
   42,431.07/63,648.63 = 13,969.83/x
3. Step 3: Cross multiply
   42,431.07x = 63,648.63 × 13,969.83
4. Step 4: Simplify right side
   42,431.07x = 889,160,540.83
5. Step 5: Solve for x
   x = 889,160,540.83/42,431.07
6. Step 6: Final answer
   x = 20,955.41