Finding the Fourth Proportional to 56,145.38, 77,480.69 and 30,994.88

Step by Step Solution

1. Step 1: Write the proportion equation
   56,145.38 : 77,480.69 = 30,994.88 : x
2. Step 2: Convert to fraction form
   56,145.38/77,480.69 = 30,994.88/x
3. Step 3: Cross multiply
   56,145.38x = 77,480.69 × 30,994.88
4. Step 4: Simplify right side
   56,145.38x = 2,401,504,688.87
5. Step 5: Solve for x
   x = 2,401,504,688.87/56,145.38
6. Step 6: Final answer
   x = 42,772.97