Finding the Fourth Proportional to 30,548.40, 42,156.72 and 18,611.73

Step by Step Solution

1. Step 1: Write the proportion equation
   30,548.40 : 42,156.72 = 18,611.73 : x
2. Step 2: Convert to fraction form
   30,548.40/42,156.72 = 18,611.73/x
3. Step 3: Cross multiply
   30,548.40x = 42,156.72 × 18,611.73
4. Step 4: Simplify right side
   30,548.40x = 784,609,490.33
5. Step 5: Solve for x
   x = 784,609,490.33/30,548.40
6. Step 6: Final answer
   x = 25,684.14