Finding the Fourth Proportional to 56,519.42, 77,997.78 and 31,028.18

Step by Step Solution

1. Step 1: Write the proportion equation
   56,519.42 : 77,997.78 = 31,028.18 : x
2. Step 2: Convert to fraction form
   56,519.42/77,997.78 = 31,028.18/x
3. Step 3: Cross multiply
   56,519.42x = 77,997.78 × 31,028.18
4. Step 4: Simplify right side
   56,519.42x = 2,420,128,767.45
5. Step 5: Solve for x
   x = 2,420,128,767.45/56,519.42
6. Step 6: Final answer
   x = 42,819.42