Finding the Fourth Proportional to 30,891.02, 42,809 and 30,300.26

Step by Step Solution

1. Step 1: Write the proportion equation
   30,891.02 : 42,809 = 30,300.26 : x
2. Step 2: Convert to fraction form
   30,891.02/42,809 = 30,300.26/x
3. Step 3: Cross multiply
   30,891.02x = 42,809 × 30,300.26
4. Step 4: Simplify right side
   30,891.02x = 1,297,123,830.34
5. Step 5: Solve for x
   x = 1,297,123,830.34/30,891.02
6. Step 6: Final answer
   x = 41,990.32