Finding the Fourth Proportional to 42,654.43, 63,979.34 and 13,072.35

Step by Step Solution

1. Step 1: Write the proportion equation
   42,654.43 : 63,979.34 = 13,072.35 : x
2. Step 2: Convert to fraction form
   42,654.43/63,979.34 = 13,072.35/x
3. Step 3: Cross multiply
   42,654.43x = 63,979.34 × 13,072.35
4. Step 4: Simplify right side
   42,654.43x = 836,360,325.25
5. Step 5: Solve for x
   x = 836,360,325.25/42,654.43
6. Step 6: Final answer
   x = 19,607.82