Finding the Fourth Proportional to 42,074.64, 63,104.52 and 13,991.88

Step by Step Solution

1. Step 1: Write the proportion equation
   42,074.64 : 63,104.52 = 13,991.88 : x
2. Step 2: Convert to fraction form
   42,074.64/63,104.52 = 13,991.88/x
3. Step 3: Cross multiply
   42,074.64x = 63,104.52 × 13,991.88
4. Step 4: Simplify right side
   42,074.64x = 882,950,871.30
5. Step 5: Solve for x
   x = 882,950,871.30/42,074.64
6. Step 6: Final answer
   x = 20,985.35