Finding the Fourth Proportional to 30,442.66, 42,037.59 and 19,131.76

Step by Step Solution

1. Step 1: Write the proportion equation
   30,442.66 : 42,037.59 = 19,131.76 : x
2. Step 2: Convert to fraction form
   30,442.66/42,037.59 = 19,131.76/x
3. Step 3: Cross multiply
   30,442.66x = 42,037.59 × 19,131.76
4. Step 4: Simplify right side
   30,442.66x = 804,253,082.86
5. Step 5: Solve for x
   x = 804,253,082.86/30,442.66
6. Step 6: Final answer
   x = 26,418.62