Finding the Fourth Proportional to 30,991.83, 42,775.40 and 19,676.82

Step by Step Solution

1. Step 1: Write the proportion equation
   30,991.83 : 42,775.40 = 19,676.82 : x
2. Step 2: Convert to fraction form
   30,991.83/42,775.40 = 19,676.82/x
3. Step 3: Cross multiply
   30,991.83x = 42,775.40 × 19,676.82
4. Step 4: Simplify right side
   30,991.83x = 841,683,846.23
5. Step 5: Solve for x
   x = 841,683,846.23/30,991.83
6. Step 6: Final answer
   x = 27,158.25