Finding the Fourth Proportional to 52,212.77, 72,020.85 and 30,977

Step by Step Solution

1. Step 1: Write the proportion equation
   52,212.77 : 72,020.85 = 30,977 : x
2. Step 2: Convert to fraction form
   52,212.77/72,020.85 = 30,977/x
3. Step 3: Cross multiply
   52,212.77x = 72,020.85 × 30,977
4. Step 4: Simplify right side
   52,212.77x = 2,230,989,870.45
5. Step 5: Solve for x
   x = 2,230,989,870.45/52,212.77
6. Step 6: Final answer
   x = 42,728.82