Finding the Fourth Proportional to 42,067.53, 63,087.65 and 13,980.04

Step by Step Solution

1. Step 1: Write the proportion equation
   42,067.53 : 63,087.65 = 13,980.04 : x
2. Step 2: Convert to fraction form
   42,067.53/63,087.65 = 13,980.04/x
3. Step 3: Cross multiply
   42,067.53x = 63,087.65 × 13,980.04
4. Step 4: Simplify right side
   42,067.53x = 881,967,870.51
5. Step 5: Solve for x
   x = 881,967,870.51/42,067.53
6. Step 6: Final answer
   x = 20,965.53