Finding the Fourth Proportional to 56,419.05, 77,857.98 and 30,926.49

Step by Step Solution

1. Step 1: Write the proportion equation
   56,419.05 : 77,857.98 = 30,926.49 : x
2. Step 2: Convert to fraction form
   56,419.05/77,857.98 = 30,926.49/x
3. Step 3: Cross multiply
   56,419.05x = 77,857.98 × 30,926.49
4. Step 4: Simplify right side
   56,419.05x = 2,407,874,039.89
5. Step 5: Solve for x
   x = 2,407,874,039.89/56,419.05
6. Step 6: Final answer
   x = 42,678.39