Finding the Fourth Proportional to 56,400.05, 77,831.82 and 30,906.38

Step by Step Solution

1. Step 1: Write the proportion equation
   56,400.05 : 77,831.82 = 30,906.38 : x
2. Step 2: Convert to fraction form
   56,400.05/77,831.82 = 30,906.38/x
3. Step 3: Cross multiply
   56,400.05x = 77,831.82 × 30,906.38
4. Step 4: Simplify right side
   56,400.05x = 2,405,499,805.01
5. Step 5: Solve for x
   x = 2,405,499,805.01/56,400.05
6. Step 6: Final answer
   x = 42,650.67