Finding the Fourth Proportional to 42,654.79, 63,961.12 and 13,065.49

Step by Step Solution

1. Step 1: Write the proportion equation
   42,654.79 : 63,961.12 = 13,065.49 : x
2. Step 2: Convert to fraction form
   42,654.79/63,961.12 = 13,065.49/x
3. Step 3: Cross multiply
   42,654.79x = 63,961.12 × 13,065.49
4. Step 4: Simplify right side
   42,654.79x = 835,683,373.75
5. Step 5: Solve for x
   x = 835,683,373.75/42,654.79
6. Step 6: Final answer
   x = 19,591.78