Finding the Fourth Proportional to 30,779.06, 42,448.43 and 20,019.94

Step by Step Solution

1. Step 1: Write the proportion equation
   30,779.06 : 42,448.43 = 20,019.94 : x
2. Step 2: Convert to fraction form
   30,779.06/42,448.43 = 20,019.94/x
3. Step 3: Cross multiply
   30,779.06x = 42,448.43 × 20,019.94
4. Step 4: Simplify right side
   30,779.06x = 849,814,965.62
5. Step 5: Solve for x
   x = 849,814,965.62/30,779.06
6. Step 6: Final answer
   x = 27,610.17