Finding the Fourth Proportional to 30,498.13, 42,113.40 and 19,186.56

Step by Step Solution

1. Step 1: Write the proportion equation
   30,498.13 : 42,113.40 = 19,186.56 : x
2. Step 2: Convert to fraction form
   30,498.13/42,113.40 = 19,186.56/x
3. Step 3: Cross multiply
   30,498.13x = 42,113.40 × 19,186.56
4. Step 4: Simplify right side
   30,498.13x = 808,011,275.90
5. Step 5: Solve for x
   x = 808,011,275.90/30,498.13
6. Step 6: Final answer
   x = 26,493.80