Finding the Fourth Proportional to 30,878.56, 42,610.98 and 19,554.04

Step by Step Solution

1. Step 1: Write the proportion equation
   30,878.56 : 42,610.98 = 19,554.04 : x
2. Step 2: Convert to fraction form
   30,878.56/42,610.98 = 19,554.04/x
3. Step 3: Cross multiply
   30,878.56x = 42,610.98 × 19,554.04
4. Step 4: Simplify right side
   30,878.56x = 833,216,807.36
5. Step 5: Solve for x
   x = 833,216,807.36/30,878.56
6. Step 6: Final answer
   x = 26,983.67