Finding the Fourth Proportional to 30,751.38, 42,435.90 and 19,426.91

Step by Step Solution

1. Step 1: Write the proportion equation
   30,751.38 : 42,435.90 = 19,426.91 : x
2. Step 2: Convert to fraction form
   30,751.38/42,435.90 = 19,426.91/x
3. Step 3: Cross multiply
   30,751.38x = 42,435.90 × 19,426.91
4. Step 4: Simplify right side
   30,751.38x = 824,398,197.89
5. Step 5: Solve for x
   x = 824,398,197.89/30,751.38
6. Step 6: Final answer
   x = 26,808.49