Finding the Fourth Proportional to 56,318.79, 77,716.56 and 30,820.10

Step by Step Solution

1. Step 1: Write the proportion equation
   56,318.79 : 77,716.56 = 30,820.10 : x
2. Step 2: Convert to fraction form
   56,318.79/77,716.56 = 30,820.10/x
3. Step 3: Cross multiply
   56,318.79x = 77,716.56 × 30,820.10
4. Step 4: Simplify right side
   56,318.79x = 2,395,231,877.85
5. Step 5: Solve for x
   x = 2,395,231,877.85/56,318.79
6. Step 6: Final answer
   x = 42,529.89