Finding the Fourth Proportional to 30,779.34, 42,498.24 and 18,858.96

Step by Step Solution

1. Step 1: Write the proportion equation
   30,779.34 : 42,498.24 = 18,858.96 : x
2. Step 2: Convert to fraction form
   30,779.34/42,498.24 = 18,858.96/x
3. Step 3: Cross multiply
   30,779.34x = 42,498.24 × 18,858.96
4. Step 4: Simplify right side
   30,779.34x = 801,472,608.23
5. Step 5: Solve for x
   x = 801,472,608.23/30,779.34
6. Step 6: Final answer
   x = 26,039.30