Finding the Fourth Proportional to 28,067.12, 42,054.90 and 13,057.94

Step by Step Solution

1. Step 1: Write the proportion equation
   28,067.12 : 42,054.90 = 13,057.94 : x
2. Step 2: Convert to fraction form
   28,067.12/42,054.90 = 13,057.94/x
3. Step 3: Cross multiply
   28,067.12x = 42,054.90 × 13,057.94
4. Step 4: Simplify right side
   28,067.12x = 549,150,360.91
5. Step 5: Solve for x
   x = 549,150,360.91/28,067.12
6. Step 6: Final answer
   x = 19,565.61