Finding the Fourth Proportional to 30,591.79, 42,202.34 and 19,840.07

Step by Step Solution

1. Step 1: Write the proportion equation
   30,591.79 : 42,202.34 = 19,840.07 : x
2. Step 2: Convert to fraction form
   30,591.79/42,202.34 = 19,840.07/x
3. Step 3: Cross multiply
   30,591.79x = 42,202.34 × 19,840.07
4. Step 4: Simplify right side
   30,591.79x = 837,297,069.55
5. Step 5: Solve for x
   x = 837,297,069.55/30,591.79
6. Step 6: Final answer
   x = 27,369.99