Finding the Fourth Proportional to 42,185.60, 63,309.52 and 19,998.88

Step by Step Solution

1. Step 1: Write the proportion equation
   42,185.60 : 63,309.52 = 19,998.88 : x
2. Step 2: Convert to fraction form
   42,185.60/63,309.52 = 19,998.88/x
3. Step 3: Cross multiply
   42,185.60x = 63,309.52 × 19,998.88
4. Step 4: Simplify right side
   42,185.60x = 1,266,119,493.34
5. Step 5: Solve for x
   x = 1,266,119,493.34/42,185.60
6. Step 6: Final answer
   x = 30,013.07