Finding the Fourth Proportional to 42,443.79, 63,672.39 and 13,971.84

Step by Step Solution

1. Step 1: Write the proportion equation
   42,443.79 : 63,672.39 = 13,971.84 : x
2. Step 2: Convert to fraction form
   42,443.79/63,672.39 = 13,971.84/x
3. Step 3: Cross multiply
   42,443.79x = 63,672.39 × 13,971.84
4. Step 4: Simplify right side
   42,443.79x = 889,620,445.50
5. Step 5: Solve for x
   x = 889,620,445.50/42,443.79
6. Step 6: Final answer
   x = 20,959.97