Finding the Fourth Proportional to 30,499.13, 42,114.78 and 19,187.56

Step by Step Solution

1. Step 1: Write the proportion equation
   30,499.13 : 42,114.78 = 19,187.56 : x
2. Step 2: Convert to fraction form
   30,499.13/42,114.78 = 19,187.56/x
3. Step 3: Cross multiply
   30,499.13x = 42,114.78 × 19,187.56
4. Step 4: Simplify right side
   30,499.13x = 808,079,868.14
5. Step 5: Solve for x
   x = 808,079,868.14/30,499.13
6. Step 6: Final answer
   x = 26,495.18