Finding the Fourth Proportional to 42,080.79, 63,076.87 and 13,993.30

Step by Step Solution

1. Step 1: Write the proportion equation
   42,080.79 : 63,076.87 = 13,993.30 : x
2. Step 2: Convert to fraction form
   42,080.79/63,076.87 = 13,993.30/x
3. Step 3: Cross multiply
   42,080.79x = 63,076.87 × 13,993.30
4. Step 4: Simplify right side
   42,080.79x = 882,653,372.30
5. Step 5: Solve for x
   x = 882,653,372.30/42,080.79
6. Step 6: Final answer
   x = 20,975.21