Finding the Fourth Proportional to 30,789.86, 42,474.98 and 19,453.91

Step by Step Solution

1. Step 1: Write the proportion equation
   30,789.86 : 42,474.98 = 19,453.91 : x
2. Step 2: Convert to fraction form
   30,789.86/42,474.98 = 19,453.91/x
3. Step 3: Cross multiply
   30,789.86x = 42,474.98 × 19,453.91
4. Step 4: Simplify right side
   30,789.86x = 826,304,274.43
5. Step 5: Solve for x
   x = 826,304,274.43/30,789.86
6. Step 6: Final answer
   x = 26,836.90