Finding the Fourth Proportional to 30,990.83, 42,774.02 and 19,675.82

Step by Step Solution

1. Step 1: Write the proportion equation
   30,990.83 : 42,774.02 = 19,675.82 : x
2. Step 2: Convert to fraction form
   30,990.83/42,774.02 = 19,675.82/x
3. Step 3: Cross multiply
   30,990.83x = 42,774.02 × 19,675.82
4. Step 4: Simplify right side
   30,990.83x = 841,613,605.95
5. Step 5: Solve for x
   x = 841,613,605.95/30,990.83
6. Step 6: Final answer
   x = 27,156.86