Finding the Fourth Proportional to 30,602.83, 42,221.07 and 19,998.61

Step by Step Solution

1. Step 1: Write the proportion equation
   30,602.83 : 42,221.07 = 19,998.61 : x
2. Step 2: Convert to fraction form
   30,602.83/42,221.07 = 19,998.61/x
3. Step 3: Cross multiply
   30,602.83x = 42,221.07 × 19,998.61
4. Step 4: Simplify right side
   30,602.83x = 844,362,501.61
5. Step 5: Solve for x
   x = 844,362,501.61/30,602.83
6. Step 6: Final answer
   x = 27,591.00